Alex Salmond has demanded that David Cameron apologise for suggesting that MPs who oppose airstrikes in Syria are voting with terrorist sympathisers.
The former SNP leader described the comments as “deeply insulting”.
His call came amid angry scenes in the Commons at the start of a 10-hour debate on proposals to extend bombing raids against Islamic State (IS) into Syria.
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Mr Cameron told MPs that he respected those who held opposing views.
“There is honour in voting for, there is honour in voting against,” he said.
But Mr Cameron faced calls from across the opposition benches to retract his comments.
Labour leader Jeremy Corbyn became the 11th MP to ask the Conservative leader to apologies, offering him the floor to do so.
Mr Cameron remained in his seat.
MPs were furious after the Prime Minister was reported to have urged his own MPs to back action in Syria and not to vote alongside Jeremy Corbyn and “a bunch of terrorist sympathisers”.
No 10 refused to be drawn on the remarks.