The party, however, did not announce as whether it would merge with any other party or become part of some other alliance.
Two poll surveys on Thursday projected a majority for the JD-U-RJD-Congress alliance in the Bihar assembly polls.
A crowd of Tejashwi supporters that had gathered outside the 10 Circular Road residence of former chief minister Rabri Devi expecting a victory is thinning now.
The Mahagathbandhan, or grand alliance, on Saturday reached a consensus on seat distribution with the JD-U and the RJD to contest 101 seats each while Congress will put up candidates in 41 seats for the October-November Bihar assembly poll.
Taking a cue from the massive victory of the Grand Alliance against the Bharatiya Janata Party in Bihar, Uttar Pradesh CM Akhilesh Yadav on Sunday said such a tie-up was possible in the state where assembly elections are due in early 2017.
'This is the first time since Independence that we are facing such a despairing situation.'
The RJD will give one seat to the CPI-ML from its quota and former JD-U president Sharad Yadav will contest on RJD symbol.
This is the first time, since the JDU-BJP alliance came to power in 2005, that the saffron party has staked claim for the speakers post.
Yadav is all set to approach the Election Commission of India to claim the election symbol of the party -- 'arrow'.
Lobbying has intensified among NDA partners in Bihar for the post of Speaker in the assembly, with BJP MLA Prem Kumar considered a frontrunner. A special assembly session will be convened soon to elect the Speaker.
The Congress on Thursday virtually ruled out any grand alliance in poll bound Uttar Pradesh including with Samajwadi Party insisting that Rahul Gandhi wanted to set things right in the state which is in bad shape for past 27 years in non-Congress rule.
Manjhi had demanded that the NDA field at least one member from his party for the six Rajya Sabha polls in the state scheduled next month
Call it political opportunism or sagacity, his moves, in effect, have not allowed the Bharatiya Janata Party to appoint its own chief minister to date, despite enjoying a near hegemonic status nationally and the best performance in recently held assembly polls where the saffron party bagged 89 seats, followed by the Janata Dal-United with 85.
The home portfolio of Bihar, which Chief Minister Nitish Kumar kept with himself all through his nearly 20-year-long tenure, has been given to his deputy, BJP leader Samrat Chowdhury, this time, according to an official notification issued on Friday.
While the assembly elections are being seen as largely a contest between the NDA and the Grand Alliance, the state has been witness to mushrooming of "morchas" (fronts) which may queer the pitch for the lead players in a tight contest.
Bihar Chief Minister Nitish Kumar's Janata Dal-United on Saturday maintained that 'there is no confusion' among the 'Mahagathbandhan' (grand alliance) partners in Bihar.
The Samajwadi Party on Thursday pulled out of the 'grand alliance' in poll-bound Bihar, saying it felt "humiliated" as it was not consulted while deciding seats and would contest the assembly elections in the state on its own.
Raising the 'Jungle Raj' pitch, Prime Minister Narendra Modi on Friday warned that Lalu Prasad will "remote control" the affairs in Bihar and "kidnapping" will be only industry that will flourish if the opposition grand alliance comes to power.
Hitting back at Nitish Kumar, who on Monday mouthed a limerick set to a film song to attack him, Prime Minister Narendra Modi on Tuesday likened JD(U)-RJD-Congress alliance to "three idiots", advised the chief minister to perfect the art of "Mushaira" and practise it at leisure after the Bihar polls.
Party said it will take action against Sharad Yadav if he attends Lalu Yadav's August 27 rally.
The Congress, out of power in Madhya Pradesh for nearly 15 years, has also expressed its willingness to align with like-minded parties to take on the BJP.
Releasing the manifesto titled 'Badlav Ka Sankalp' (commitment to change) in the presence of All India Congress Committee (AICC) general secretary Randeep Singh Surjewala and other Mahagathbandhan leaders, Tejashwi Yadav said their government, if elected, would first approve the process for appointments on about 10 lakh jobs in the government.
The central agency which is often accused, by parties opposed to the BJP, of having become a political instrument in the hands of the party ruling the Centre, has reopened inquiry into a case against Prasad which it had closed last year.
The swearing-in ceremony was attended by Prime Minister Narendra Modi, Union Home Minister Amit Shah, BJP national president J P Nadda and several other top leaders of the NDA.
'When maximum voter participation occurs, they do not vote to re-elect the incumbent government. They vote to change it.' 'How can anyone credibly suggest that crores of young voters -- particularly the unemployed youth -- would vote to re-elect an existing government that has demonstrably failed them?'
A 7.8 per cent increase in votes for the JD-U-RJD-Congress alliance over BJP-led NDA's tally fetched it another 120 seats catapulting the Nitish Kumar-led coalition to a landslide two-third majority.
JD-U on Friday dismissed the Samajwadi Party-driven formation of a 'Third Front' for the Bihar polls and said that there was "only one front" in the state.
Singh targeted the Congress using a 'snakes and ladders' analogy, saying the party will fall to zero from 99 after being bitten by a snake -- referring to the grand old party winning 99 seats in the Lok Sabha polls.
This is the biggest action taken against rebel leaders close to Yadav by the JD-U in Bihar.
Prime Minister Narendra Modi launched his Bihar assembly poll campaign, asserting that the NDA under Chief Minister Nitish Kumar will break all previous electoral records. He criticized the INDIA bloc and highlighted the NDA's cohesiveness and development efforts in Bihar.
'If the RJD loses it would be out of power for nearly 25 years. Meanwhile, the JD-U will have survival issues if it gets less number of seats.'
The two leaders, reports say, discussed the charges against Tejashwi.
Concealed beneath the feat, which testifies to his political acumen and survival instincts, is the fact that the 72-year-old leader could never remain at peace with his allies which also made him change partners frequently.
Confusion prevailing in the Indian National Developmental Inclusive Alliance (INDIA) showed little signs of let up on Saturday, with just two days to go before the filing of nomination papers for the second and final phase of assembly elections comes to a close.
Internal discord within the INDIA bloc has led to alliance partners contesting against each other in at least eight assembly seats in Bihar. The Congress, RJD, and Left parties are facing challenges in seat-sharing arrangements for the upcoming elections.
Asked how many seats the Congress would fight on, Singh said they would be flexible in seat sharing.
Pointing out that this is the first time that a complete alliance has been formed by the major Left parties in Bihar, the Communist Party of India state secretary Rajendra Prasad Singh said top Central leaders of the three parties will campaign together for the by-elections.
Putting up a stunning show, the Janata Dal-United-led grand alliance was on Sunday well on the road to gaining a thumping majority in the Bihar assembly.
As per the trends, the NDA was leading in the elections.
JD-U Rajya Sabha MPs Ali Anwar and M P Veerendra Kumar met senior leader Sharad Yadav amid reports that he was also displeased with Nitish Kumar's action.