1 Samuel 18:25

And Saul said, Thus shall ye say to David, The king desireth not any dowry, but an hundred foreskins of the Philistines, to be avenged of the king's enemies. But Saul thought to make David fall by the hand of the Philistines.

The king desireth not any dowry. In Eastern countries the husband purchases his wife either by gifts or services. Since neither David nor his family were in circumstances to give a suitable dowry for a princess, the king intimated that he would be graciously pleased to accept some gallant deed in the public service.

An hundred foreskins of the Philistines. Such mutilations on the bodies of their slain enemies were commonly practiced in ancient war, and the number told indicated the glory of the victory. Saul's willingness to accept a public service had an air of liberality, while his choice of so difficult and hazardous a service seemed only putting a proper value on gaining the hand of a king's daughter. But he covered unprincipled malice against David under this proposal, which exhibited a zeal for God and the covenant of circumcision.