Fernando Chireno of Passaic was to be sentenced Friday.
But a judge postponed the session until Tuesday after Chireno repeatedly disrupted the proceedings and said he had not read the presentencing reports, as required by law.
A Passaic County jury convicted the 34-year-old Chireno of murder in June, rejecting his claim that he was insane when the April 2008 slayings occurred.
He now faces life in prison.
Chireno's 26-year-old wife, Luisa, had a restraining order against him at the time of the attack.
Prosecutors say the couple was separated and living apart when Chireno broke into his wife's apartment and chased her while their children cowered together. He eventually hacked her 15 times before she collapsed in the street.