Kumar, who jettisoned Lalu Prasad's RJD and Congress on July 26 and put in his papers, also claimed attempts were being made to engineer defections in his party.
"I know none of you would believe me that I had no previous thinking of joining hands with the BJP after tendering my resignation to the Governor on July 26.
He said BJP legislators and those of its allies immediately joined the meeting of JD(U) lawmakers where he was chosen the leader of their joint legislature party after which he staked claim to form the government.
Kumar claimed, before the quick-paced developments plunged Bihar into a political turmoil, a "behind the scene game" was being played out where JD(U) MLAs were being "lured" to defect.
More From This Section
Kumar, also the JD(U) president, warned that rebel veteran leader Sharad Yadav, who is upset over the split in the 3-party Grand Alliance in Bihar, would lose his Rajya Sabha seat if he were to attend the RJD's August 27 rally in Patna, in violation of a party directive.
The Bihar chief minister said he had challenged his detractors to break the party at the open session after the JD(U) national executive meeting last Saturday. "I repeat my challenge today," he said.
"If you go into the technicality of this provision....If somebody even sends a photograph of a party leader sharing platform of another party to the president of the party to which the leader belongs, it would amount to that person giving up the membership of the party on his own," he said, and cited instance of former Bihar MP (Capt. Jai Narain Nishad) who lost his membership on that ground.
Kumar, however, did not elaborate whether the provision existed in the JD(U) constitution or the Anti-Defection Law.