First Book of Kings (Author Compiled by Isaias from records of Samuel, David, Nathan, and Gad.)
26:6David spoke to Achimelech, the Hethite, and Abisai, the son of Sarvia, the brother of Joab, saying: Who will go down with me to Saul into the camp? And Abisai said: I will go with thee.
Original from Project Gutenberg - Massive cleanup of OCR problems and editing done locally.