"I stood by Lalu Prasad in times of need and helped him reach power despite the fact that he always humiliated me," Pappu Yadav said at a "Kudal Haal" rally here, his Lok Sabha constituency.
Sharpening his attack, Pappu Yadav said the "RJD chief threw me after use" and blamed Prasad of practising 'double standards'.
"When I met Prime Minister Narendra Modi for development of Kosi there was a row, but when the PM went to Lalu Prasad's daughter marriage it was called a courtsey.
He also alleged that Prasad's sons have been humiliating party leaders with "encouragement from their father."
Pappu Yadav was expelled last week from RJD for six years for anti-party activities.
He fell ill after the rally and was checked by doctors.
