Former Samajwadi Party leader Amar Singh on Wednesday said he was a 'principal player' to get support for the UPA government during the trust vote in 2008 at the instruction of his leader.
But he denied any "deal" was done to save the SP leadership from CBI case.
Participating in a short duration discussion on Prime Minister Manmohan Singh's statement in the Rajya Sabha, the former SP General Secretary said he was being described as a main player in the episode.
"I say it proudly that I had become a principal player because that was the order of the leadership of the party to which I belonged at that time. I followed the order that I was given," Singh said.
Refuting BJP leader Arun Jaitley's allegation that a deal was done to save a big leader of a political party from some case, Singh said "there cannot be a bigger lie than this".
He said since CBI had submitted its report on the case to the Supreme Court even before the trust vote, "there is no question of the deal."
Without referring to SP chief Mulayam Singh Yadav, he said even in its last argument, the CBI's report was not in favour of "that big leader of the big party".
CBI was investigating a case relating to disporportionate assets case agianst Yadav.
Referring to the sting operation of the cash-for-vote scam, Singh said it was difficult to find the truth.
"There are not only one or two tapes.... One tape of CNN-IBN and one tape of Tehelka. Now what is the truth and what is the untruth? Everyone has his own story," he said.