1 Samuel 17:34-37

17:34 David replied to Saul, “Your servant has been a shepherd for his father’s flock. Whenever a lion or bear would come and carry off a sheep from the flock, 17:35 I would go out after it, strike it down, and rescue the sheep from its mouth. If it rose up against me, I would grab it by its jaw, strike it, and kill it. 17:36 Your servant has struck down both the lion and the bear. This uncircumcised Philistine will be just like one of them. ¹  For he has defied the armies of the living God!” 17:37 David went on to say, “The Lord who delivered me from the lion and the bear will also deliver me from the hand of this Philistine!” Then Saul said to David, “Go! The Lord will be with you.” ² 

1 Samuel 17:46

17:46 This very day the Lord will deliver you into my hand! I will strike you down and cut off your head. This day I will give the corpses of the Philistine army to the birds of the sky and the wild animals of the land. Then all the land will realize that Israel has a God

[17:36]  ¹ tc The LXX includes here the following words not found in the MT: “Should I not go and smite him, and remove today reproach from Israel? For who is this uncircumcised one?”

[17:37]  ² tn Or “Go, and may the Lord be with you” (so NASB, NCV, NRSV).