6 But he didn’t count Levi and Benjamin among them; for the king’s word was abominable to Joab.
1 Chronicles 21:6 Cross References - WEB
Numbers 1:47-49
2 Samuel 3:27
27 When Abner was returned to Hebron, Joab took him aside into the middle of the gate to speak with him quietly, and struck him there in the body, so that he died, for the blood of Asahel his brother.
2 Samuel 11:15-21
15 He wrote in the letter, saying, “Send Uriah to the forefront of the hottest battle, and retreat from him, that he may be struck, and die.”
16 When Joab kept watch on the city, he assigned Uriah to the place where he knew that valiant men were.
17 The men of the city went out, and fought with Joab. Some of the people fell, even of David’s servants; and Uriah the Hittite died also.
18 Then Joab sent and told David all the things concerning the war;
19 and he commanded the messenger, saying, “When you have finished telling all the things concerning the war to the king,
20 it shall be that, if the king’s wrath arise, and he asks you, ‘Why did you go so near to the city to fight? Didn’t you know that they would shoot from the wall?
21 Who struck Abimelech the son of Jerubbesheth? Didn’t a woman cast an upper millstone on him from the wall, so that he died at Thebez? Why did you go so near the wall?’ then you shall say, ‘Your servant Uriah the Hittite is also dead.’”
2 Samuel 20:9-10
9 Joab said to Amasa, “Is it well with you, my brother?” Joab took Amasa by the beard with his right hand to kiss him.
10 But Amasa took no heed to the sword that was in Joab’s hand. So he struck him with it in the body, and shed out his bowels to the ground, and didn’t strike him again; and he died. Joab and Abishai his brother pursued Sheba the son of Bichri.
1 Chronicles 27:24
24 Joab the son of Zeruiah began to take a census, but didn’t finish; and wrath came on Israel for this. The number wasn’t put into the account in the chronicles of king David.