The stabbing happened around midnight on the 100 block of South Black Horse Pike.
Three males pulled up along the gas station in a blue minivan.
According to police, two males got out of the van and one stabbed the other in the shoulder.
The man in the van drove off and the stabbing suspect fled on foot.
The victim was treated at the hospital and is listed in stable condition.
Police are checking out surveillance video for descriptions of the suspects.