1 Chronicles 12:19

And some from Manasseh fell to David when he came with the Philistines to battle against Saul. (But they did not help them. For the lords of the Philistines sent him away on advice, saying, He will fall to his master Saul with our heads.)

1 Samuel 29:2-9

And the lords of the Philistines passed on by hundreds and by thousands. But David and his men passed on in the rear with Achish.

Treasury of Scripture Knowledge

Summary

And there fell some of Manasseh to David, when he came with the Philistines against Saul to battle: but they helped them not: for the lords of the Philistines upon advisement sent him away, saying, He will fall to his master Saul to the jeopardy of our heads.

When he came

Bible References

When he came

1 Samuel 29:2
And the lords of the Philistines passed on by hundreds and by thousands. But David and his men passed on in the rear with Achish.