SNP MP Pete Wishart was told off for telling Tory MPs to “shut up” while they heckled him during a debate on migration.
Speaking in the House of Commons chamber, the SNP deputy Westminster leader was rapped by Deputy Speaker Nusrat Ghani for his comment.
The exchange took place during Home Office questions on Monday.
Wishart said limiting paths to citizenship is “one of the most shocking and egregious things this Government has done”, and that “there are no safe routes to get to the UK”.
He told MPs: “One of the most shocking and egregious things this Government has done is to impose a blanket ban on British citizenship for all individuals who have entered the UK irregularly without any parliamentary scrutiny or public consultation, effectively disenfranchising all asylum seekers and refugees, including those who have made this country their home for years.
“The Refugee Council estimates that up to 71,000 refugees who have already been granted asylum could now be blocked from securing naturalisation.
“[Home Secretary Yvette Cooper] knows there are no safe routes to get to the UK, so nearly all asylum seekers have to arrive irregularly.
“Surely this clearly breaches article 31 of the 1951 Refugee Convention, which prohibits penalising those seeking protection for the mode of entry?”
Wishart then told Tory MPs to “shut up” as they shouted from their benches.
Shadow home secretary Chris Philp could be seen pointing and shouting at Wishart while the exchange took place.
It's understood that Tory MPs were shouting that migrants were "illegals", prompting Wishart to hit back.
Over groans, Ghani interjected and said: “Members should be respectful and mindful of their language the whole time.
“Now we need to hear the minister respond.”
Home Office minister Seema Malhotra said: “(Wishart) will know that with the changes that we made we also explained that each citizenship application will continue to be considered on a case-by-case basis and the Secretary of State may choose to apply discretion to grant citizenship on an exceptional basis where there has been particularly exceptional or mitigating circumstances, such as modern slavery.”