Kings I 28:2

2 And David said to Anchus, Thus now thou shalt know what thy servant will do. And Anchus said to David, So will I make thee captain of my body-guard continually.

Kings I 28:2 In-Context

1 And it came to pass in those days that the Philistines gathered themselves together with their armies to go out to fight with Israel; and Anchus said to David, Know surely, that thou shalt go forth to battle with me, , and thy men.
2 And David said to Anchus, Thus now thou shalt know what thy servant will do. And Anchus said to David, So will I make thee captain of my body-guard continually.
3 And Samuel died, and all Israel lamented for him, and they bury him in his city, in Armathaim. And Saul had removed those who had in them divining spirits, and the wizards, out of the land.
4 And the Philistines assemble themselves, and come and encamp in Sonam: and Saul gathers all the men of Israel, and they encamp in Gelbue.
5 And Saul saw the camp of the Philistines, and he was alarmed, and his heart was greatly dismayed.

The Brenton translation of the Septuagint is in the public domain.