What started as an argument between two brothers ended in a stabbing on Saturday evening in Encanto, according to San Diego police.
The stabbing occurred just before 6:53 p.m. in the 1900 block of Klauber Avenue, said Officer David Stafford.
"Two brothers got into an argument about the younger brother's girlfriend, who is living in the same residence," Stafford said in a statement.
The 42-year-old victim was stabbed by his brother 15 times in the arms, back and hands, police said.
The victim was later taken to an area hospital. His wounds were considered non-life-threatening.