MPs will vote on the UK's Brexit deal in the week beginning 14 January, Theresa May has told Parliament.
The vote was due to be held last week but was put on hold after Theresa May admitted she was set to lose.
Announcing a new date, Mrs May said the EU had made it clear the Irish backstop was "not a plot to trap the UK" and urged MPs to see Brexit through.
But Labour leader Jeremy Corbyn said he would table a motion of no confidence in the PM for delaying the vote.
He told the Commons it was unacceptable that MPs would have to wait another month before having their say on Mrs May's deal and the PM had "led the country into a national crisis".
He said a month would have been wasted since the original 11 December vote was postponed, with "not a single word renegotiated and not a single reassurance given".
"The deal is unchanged and is not going to change," he said.
"The House must get on with the vote and move on to consider the realistic alternatives."
Labour had threatened the confidence vote before Mrs May's statement but its leader had initially appeared to have backed down from the move.
But the party confirmed it would now table a motion that "this house has no confidence in the prime minister due to her failure to allow the House of Commons to have a meaningful vote straight away on the Withdrawal Agreement and the Framework for the Future Relationship between the UK and the EU".
The motion, which is likely to be tabled on Tuesday, will increase pressure on the prime minister.