Man apologises for love triangle murder

A man being sentenced for murdering his wife's lover has told a court that he had committed a sin "unforgivable in Islam".

A Sydney man who brutally murdered his wife's lover was "operated by Satan" at the time, a court has heard.

Hazairin Iskandar, who was found guilty of murdering Mohd Shah Saemin by a jury earlier this year, told the NSW Supreme Court on Friday he knows he committed a "sin that is unforgivable in Islam".

Iskander also asked Mr Saemin's family for forgiveness at the sentencing hearing.

"I'm very sorry and I ask for forgiveness from his family," he said, adding that "at that time Satan operated me".

Mr Saemin, known as Shah, died after he was attacked by Iskandar and his son Andrew outside his Leichhardt flat in Sydney's inner-west on the night of February 21, 2010.

His son has been sentenced to a minimum of 18 years' jail for his part in the murder.

Iskander told the court on Friday he had pushed his son into murdering Mr Saemin.

Defence lawyer James Trevallion, asked if Iskander was lying to protect his son, who is appealing his sentence.

"Are you making up evidence to the court because you feel guilty?" he asked.

"No, I can't make it anyone's problem," he replied.

The father and son had been sharing a cell in jail but have since been separated.

Iskandar said his son, who was a loner and had no friends, had been angry with him for involving him in the crime.

"I kissed his feet and said sorry to him," he said.

During the trial the court heard Iskandar stabbed Mr Saemin at least four times to the upper body with a knife while his son struck him repeatedly with a hammer.

The pair attacked Mr Saemin after they discovered Nita Iskander was having an affair with him.

Mr Saemin suffered several blunt-force blows to the head but ultimately bled to death at the scene from the stab wounds.

The sentencing hearing continues before Justice David Davies.