A homeless man knifed another vagrant outside Penn Station early Sunday.

The 32-year-old victim was stabbed in the stomach with a kitchen paring knife, officials said.

The violence unfolded at around 3:40 a.m. across the street from the Tick Tock Diner.

A diner employee who witnessed the fight said crime is common in the area.

“The homeless come. They fight across the street at the McDonald’s often,” he said.