1 Samuel 17:34-37

34But David said to Saul, ‘Sir, I have been a shepherd who takes care of his father's sheep. Sometimes a lion or a bear would come to take a lamb from among the sheep.

35Then I would chase after the lion or the bear. I would knock it down and I would save the lamb from its mouth. If the wild animal turned to attack me, I would take hold of its neck. Then I would hit it and kill it.

36I have killed lions and bears like that. I will do the same to this unclean Philistine. He has insulted the army of our God, who lives for ever.

37The Lord has kept me safe from lions and bears. He will also save me from the power of this Philistine soldier.’ So Saul said to David, ‘Then do it! I pray that the Lord will help you.’