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.
That says a lot of a person. One of the weaknesses is a person who is doubleminded or a person who has double allegiance. These men were not of double heart that came from Zebulun, fifty thousand of them.