Earlier, Labor leader Bill Shorten said Scott Morrison should have immediately ruled out the idea that gay people go to Hell when asked about it.
The prime minister was asked on Monday if he believed gay people go to Hell, after religion crept into the campaign on Monday.
"I support the law of the country and I always don't mix my religion with politics and my faith with politics," he told reporters.
Mr Shorten says he can't believe the issue is even being raised in the campaign, but that Mr Morrison's response wasn't good enough.
"I cannot believe that the prime minister has not immediately said that gay people will not go to Hell," he told reporters in Tasmania on Tuesday.
"This country needs to really lift itself and the political debate and coverage needs to lift itself in the next four days."
The Labor leader said his own views were firm.
"I don't believe gay people, because they're gay, will go to Hell. I don't need a law to tell me that. I don't believe it," he said.
"And I think if you want to be prime minister of Australia, you have got to be prime minister for all people.
"The nation has got to stop eating itself in this sort of madness of division and toxicity."
While being questioned on Monday, Mr Morrison would not say whether his personal opposition to same-sex marriage had changed since it was legalised following a national vote in 2017.
"It's law, and I'm glad that the change has now been made and people can get on with their lives, that's what I'm happy about," he said.
Wallaby star Israel Folau is facing the sack after posting on social media that "gays would go to Hell".
He has been backed in by a number of media commentators, lobby groups and free speech advocates.