Cushi - “The Cushite,” a foreign slave, perhaps of Joab’s, whom he did not scruple to expose to David’s anger. If, however, it is a name, it must be rendered “Haccushi.” In the title to Psalms 7, “Cush, the Benjamite,” cannot mean this Cushi, since the contents of the Psalm are not suitable to this occasion.
Related Commentaries of 2 Samuel 18:21
2 Samuel 18:21
21 Then said Joab to Cushi, Go tell the king what thou hast seen. And Cushi bowed himself unto Joab, and ran.