1 Samuel 14:20-21

And Saul is called, and all the people who are with him, and they come in unto the battle, and, lo, the sword of each hath been against his neighbour--a very great destruction.

And the Hebrews who have been for the Philistines as heretofore, who had gone up with them into the camp, have turned round, even they, to be with Israel who are with Saul and Jonathan,