Of Manasseh also there fell away some to David, when he came with the Philistines against Saul to battle: but they didn't help them; for the lords of the Philistines sent him away after consultation, saying, He will fall away to his master Saul to the jeopardy of our heads.
In view of his readers’ assumed knowledge, the Chronicler makes no attempt to record events that have little to do with his central purpose. For example, he omits all reference to the attempt by Saul’s followers to continue the rule of Saul’s family (2 Samuel 1:1-12). Instead he passes straight on to the establishment of David in Jerusalem as king over all Israel (11:1-9; see notes on 2 Samuel 5:1-10), and the important part that David’s mighty men played in establishing and maintaining his kingdom (10-47; see notes on 2 Samuel 23:8-39).