1 Kings 2:5-7

5Moreover thou knowest also what Joab the son of Zeruiah did unto me, even what he did to the two captains of the hosts of Israel, unto Abner the son of Ner, and unto Amasa the son of Jether, whom he slew, and shed the blood of war in peace, and put the blood of war upon his girdle that was about his loins, and in his shoes that were on his feet.

6Do therefore according to thy wisdom, and let not his hoar head go down to Sheol in peace.

7But show kindness unto the sons of Barzillai the Gileadite, and let them be of those that eat at thy table; for so they came to me when I fled from Absalom thy brother.