Psalm 60:7

There was also a lot for the tribe of Manasseh. He was the firstborn of Joseph. Machir was the firstborn of Manasseh, the father of Gilead: because he was a man of war, therefore he had Gilead and Bashan.

Some men from Manasseh defected from the Israelite army and joined David when he went with the Philistines to fight against Saul. But as it turned out, the Philistine leaders refused to let David and his men go with them. After much discussion, they sent them back, for they said: It will cost us our lives if David switches loyalties to Saul and turns against us.

As the firstborn of his bulls, majesty is his. His horns are the horns of the wild bull. With them he will push the peoples, all at once, to the ends of the earth. They are the ten thousands of Ephraim and the thousands of Manasseh.

David answered: That will give you a chance to see for yourself just how well we can fight! Achish said: You and your men will always be my bodyguards.