Islamabad, March 6 -- : After suffering a massive setback in the Senate election, Pakistan Prime Minister Imran Khan, who is set to face a vote of confidence in the National Assembly has threatened his party lawmakers to follow the party line or face action.

This comes after Khan said that he will sit on "Opposition benches" if lawmakers said they have no confidence in him. "Raise your hand and send me out of the government and I will go to the opposition," he said adding, "I will sit on the opposition benches if I lose the vote."

Khan's party Pakistan -- Tehreek-e-Insaf (PTI) -- has 157 members in the 342-member National Assembly. Opposition Pakistan Muslim Leauge-Nawaz and Pakistan Peoples' Party have 84 and 54 members, respectively.

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