The RJD leader further said that ''it is not in their culture to say something to someone we respect'' but added he will write a book and explain everything.
In 2019, both the BJP and the JDU had contested on 17 seats each.
The INDIA alliance must draw some succour from the response to its rally in Patna on Sunday.
Lok Sabha Speaker Om Birla, Home Minister Amit Shah and Uttar Pradesh Chief Minister Yogi Adityanath also extended birthday wishes to Kumar.
While speaking during the Bihar floor test, Yadav asked how will JD(U) MLAs face public after Nitish Kumar's three oaths.
The BJP-JD(U)-HAM combine has the support of 128 MLAs in the 243-member strong Bihar Legislative Assembly.
Nitish took the oath of office for a record ninth time after his stunning 'Ghar Wapsi' to the BJP-led NDA.
RJD supporters gathered outside Tejashwi Yadav's residence and shouted slogans against police and CM Nitish Kumar.
The Nitish Kumar-led NDA government has the support of 128 MLAs.
In the intricate chessboard of Bihar politics, chief minister Nitish Kumar's recent dalliance with the BJP has set off a seismic shift, prompting a re-evaluation of power dynamics and emerging leaders.
