Addressing a rally at Bhagalpur, Lalu Prasad moved further from his snide remarks against the LJP chief as "weathercock" and called him "ehsanfaramosh" (ungrateful).
"I helped him when he was literally on the street (after loss in 2009 Lok Sabha poll) and sent him to Delhi (as Rajya Sabha member on the basis of strength of RJD MLAs) and see what he did in return (joined hands with BJP for power)," Prasad said.
The LJP chief retorted and described him as "expert of jails."
"If I am a weather scientist and weathercock he (Prasad) should be called 'expert of jails'," the LJP chief and Union Food Minister told reporters at Patna Airport before setting out for campaign in the bypoll.
Paswan's jibe on Prasad was to highlight his imprisonments in fodder scam cases. His recent conviction in a fodder scam case in Ranchi debarred the RJD chief from contesting election for 11 year.
State minister for Food Shyam Rajak charged Paswan for doing politics in the name of dalits to promote his family's interest.
"His family members are occupying all important posts in LJP and other organisations run by him in the name of dalits," Rajak said.
Rashtriya Lok Samata Party (RLSP) President and Union Minister of State Upendra Kushwaha also joined Paswan in attacking his former leader Nitish Kumar and Lalu Prasad.
