1 Samuel 17:33

Overview - 1 Samuel 17
1	The armies of the Israelites and Philistines being ready to battle,
4	Goliath challenges a combat.
12	David, sent by his father to visit his brethren, takes the challenge.
28	Eliab chides him.
30	He is brought to Saul;
32	shews the reason of his confidence;
38	and slays the giant.
55	Saul takes notice of David.

1 Samuel 17:33  (King James Version)
And Saul said to David, Thou art not able to go against this Philistine to fight with him: for thou art but a youth, and he a man of war from his youth.