And some from Manasseh defected to David when he was going with the Philistines to battle against Saul; but they did not help them, for the lords of the Philistines sent him away by agreement, saying, "He may defect to his master Saul and endanger our heads."
1 Chronicles 12:19
Surrounding context
12:18 Then the Spirit came upon Amasai, chief of the captains, and he said: "We are yours, O David; We are on your side, O son of Jesse! Peace, peace to you, And peace to your helpers! For your God helps you." So David received them, and made them captains of the troop.
12:19 And some from Manasseh defected to David when he was going with the Philistines to battle against Saul; but they did not help them, for the lords of the Philistines sent him away by agreement, saying, "He may defect to his master Saul and endanger our heads."
12:20 When he went to Ziklag, those of Manasseh who defected to him were Adnah, Jozabad, Jediael, Michael, Jozabad, Elihu, and Zillethai, captains of the thousands who were from Manasseh.