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 you.
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George Leo Haydock
Hethite. He had probably embraced the Jewish religion.
Abisai was the son of Sarvia, David's sister, and made a great figure at court. (Calmet)
David was directed by God to manifest his clemency (Menochius) and reverence for Saul in this perilous attempt. (Haydock)