NSW Labor Senator Sam Dastyari caught on film slamming Nathan Rees over his affair with a constituent Sam Dastyari busted in Canberra for telling Doug Cameron that Rees should have kept his "d*** in his pants." NSW Labor Senator Sam Dastyari has been caught on film criticising Nathan Rees over his affair, saying his state Labor colleague should have kept his "d*** in his pants." The comment was broadcast across offices in federal parliament and the internet during a break in an estimates hearing about economic policy. Senator Dastyari was speaking to fellow NSW Senator Doug Cameron at the time. Saw the front page? Senator Dastyari asked, referring to The Daily Telegraph's revelations of Mr Rees' affair and sexual trysts with a constituent. Mate, keep your dick in your pants and your eye on the ball. Opposition Senate Leader Penny Wong tapped Senator Dastyari on the shoulder, appearing to tell him to stop talking amid concerns about microphones on the desk in front of him. NSW Labor Senator Sam Dastyari Source: News Corp Australia Liberal Senator Sean Edwards said: "Careful there's cameras." Senator Dastyari said: "What? That's a saying! Senator Cameron interjected. "That's a Sussex St saying," he responded. We don't use it in the Left. But Senator Dastyari, the former state Labor party secretary, continued to insist the comment was fine. "How is that a bad thing to say?" he protested. Senator Cameron: "We don't need to get told about it." Sources said committee chair David Bushby later spoke to Senator Dastyari privately about his language after concerns were raised about the incident. Senator Dastyari, who has been learning the ropes of estimates hearings this week after being sworn in a fortnight ago, did not return The Daily Telegraph's calls. One fellow senator described Senator Dastyari as having plenty of "chutzpah" for a rookie attending his first estimates hearings. "He's been making comments all week - he's forgotten he's not in the middle of a trade union brawl," the MP said. Nathan Rees pictured at state parliament this week.