מדרש על דברי הימים א 10:12

Whence do we learn (the duty of) showing loving-kindness to mourners? From the men of Jabesh-Gilead. For when Saul and his sons were slain, the men of Jabesh Gilead said: Are we not bound to show loving-kindness to the man who delivered us from the disgrace of the sons of Ammon? All their mighty men arose and went all night to the walls of Beth-Shan, and they took the body of Saul and the bodies of his sons from the walls of Beth-Shan, as it is said, "All the valiant men arose, and took away the body of Saul" (1 Chron. 10:12).