1 Kings 2:4-5

4so that Adonai may fulfill His word which He spoke concerning me, saying: ‘If your children watch their way, to walk before Me in truth with all their heart and with all their soul, you shall not lack a man on the throne of Israel.’

5“Moreover, you also know what Joab son of Zeruiah did to me—what he did to the two commanders of the armies of Israel, to Abner son of Ner and Amasa son of Jether, whom he killed, shedding the blood of war in peacetime, and putting the blood of war on his waistband and on his sandals on his feet.