Albert Barnes Commentary 1 Samuel 26:6

"Then answered David and said to Ahimelech the Hittite, and to Abishai the son of Zeruiah, brother to Joab, saying, Who will go down with me to Saul to the camp? And Abishai said, I will go down with thee." — 1 Samuel 26:6 (ASV)

Ahimelech the Hittite – He is only mentioned here. Uriah was also a Hittite.

Abishai – He was the son of Zeruiah, David’s sister, but was probably about the same age as David. He became very famous as a warrior (2 Samuel 23:18) but was implicated with his brother Joab in the murder of Abner in retaliation for the death of their brother Asahel (2 Samuel 3:30).