KJV: 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.
NASB: Then Saul said to David, "You are not able to go against this Philistine to fight with him; for you are but a youth while he has been a warrior from his youth."
KJV: David said moreover, The LORD that delivered me out of the paw of the lion, and out of the paw of the bear, he will deliver me out of the hand of this Philistine. And Saul said unto David, Go, and the LORD be with thee.
NASB: And David said, "The LORD who delivered me from the paw of the lion and from the paw of the bear, He will deliver me from the hand of this Philistine." And Saul said to David, "Go, and may the LORD be with you."
KJV: And David girded his sword upon his armour, and he assayed to go; for he had not proved it. And David said unto Saul, I cannot go with these; for I have not proved them. And David put them off him.
NASB: David girded his sword over his armor and tried to walk, for he had not tested them. So David said to Saul, "I cannot go with these, for I have not tested them." And David took them off.
KJV: And when Saul saw David go forth against the Philistine, he said unto Abner, the captain of the host, Abner, whose son is this youth? And Abner said, As thy soul liveth, O king, I cannot tell.
NASB: Now when Saul saw David going out against the Philistine, he said to Abner the commander of the army, "Abner, whose son is this young man?" And Abner said, "By your life, O king, I do not know."
KJV: And as David returned from the slaughter of the Philistine, Abner took him, and brought him before Saul with the head of the Philistine in his hand.
NASB: So when David returned from killing the Philistine, Abner took him and brought him before Saul with the Philistine's head in his hand.
KJV: And it came to pass, when he had made an end of speaking unto Saul, that the soul of Jonathan was knit with the soul of David, and Jonathan loved him as his own soul.
NASB: Now it came about when he had finished speaking to Saul, that the soul of Jonathan was knit to the soul of David, and Jonathan loved him as himself.