Then David ordered Joab and all the people with him, “Tear your clothes, put on sackcloth, and mourn before Abner.” And King David himself walked behind the funeral bier.
Jewish Publication Society of America Version (JPS1917) - 2 Samuel 3:31 >And David said to Joab, and to all the people that were with him: 'Rend your clothes, and gird you with sackcloth, and wail before Abner.' And king David followed the bier.