1 Chronicles 11:18

11:18 So the three elite warriors broke through the Philistine forces and drew some water from the cistern in Bethlehem near the city gate. They carried it back to David, but David refused to drink it. He poured it out as a drink offering to the Lord

1 Chronicles 12:19

12:19 Some men from Manasseh joined David when he went with the Philistines to fight against Saul. (But in the end they did not help the Philistines because, after taking counsel, the Philistine lords sent David away, saying: “It would be disastrous for us if he deserts to his master Saul.”)