1 Chronicles 12:19

And, of Manasseh, there fell away unto David, when he came with the Philistines against Saul to battle, but they helped them not, - for the lords of the Philistines advisedly sent him away, saying, At the price of our heads, he might fall away to his master, Saul.

1 Samuel 29:2-9

And, the lords of the Philistines, were passing on by hundreds, and by thousands, - but, David and his men, were passing 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, were passing on by hundreds, and by thousands, - but, David and his men, were passing on in the rear, with Achish.