1 Samuel 17:8-9

8Goliath stood up and he shouted to the Israelite soldiers, ‘Why have you all got ready to fight against us? I am the great soldier of the Philistine army. You serve Saul as his soldiers. Is that not true? So you must choose one of your men to come and fight against me.

9If he can kill me in a fight, we Philistines will become your slaves. But if I knock him down and I kill him, then you Israelites will become our slaves.’