Which part was unparliamentary language? Was it "Abbott and Costello" or "The Three Stooges"?

Yesterday in the House of Representatives:  

Mr BRADBURY (Lindsay—Assistant Treasurer and Minister Assisting for Deregulation) ... I was not surprised to see reports in the papers today that there is a cunning and devious plan to parachute Peter Costello back into parliament. They figure that is about the only way they might be able to give their economic leadership a little bit of credibility.

Honourable members interjecting

The DEPUTY SPEAKER: The Assistant Treasurer will return to the question.

Mr BRADBURY: Unfortunately, it looks as though what was reported might not be happening—we will not be getting Abbott and Costello; we are just stuck with the Three Stooges.

Ms Julie Bishop: Madam Deputy Speaker, I rise on a point of order. Previously that phrase has been deemed unparliamentary and I ask that he withdraw.

The DEPUTY SPEAKER: The Deputy Leader of the Opposition is correct. That has been ruled as out of order in this context, and I will ask the Assistant Treasurer to withdraw.

Opposition members interjecting

The DEPUTY SPEAKER: Everybody on that side might walk the plank very quickly if they do not show some respect to the chair. The Assistant Treasurer has the call.

Mr BRADBURY: I withdraw.

The DEPUTY SPEAKER:I thank the Assistant Treasurer.

Source: Hansard, House of Representatives, 10/05/12

Image credit: perthnow.com.au