Cops are looking for a man they say stabbed his mother’s boyfriend in Harlem Monday evening.

Davin Goulbourne, 19, and Dellroy Anderson, 30, had an altercation at 400 Manhattan Ave. just before 6 p.m., cops said. The dispute came to a head when Goulbourne stabbed Anderson twice in the left hand and fled the scene.

Cops locked down the building for a search, but were unable to locate Goulbourne, who remains at large.

Emergency responders rushed the Anderson to St. Luke’s Hospital, where he was listed in serious but stable condition.