KJV: If he be able to fight with me, and to kill me, then will we be your servants: but if I prevail against him, and kill him, then shall ye be our servants, and serve us.
NASB: "If he is able to fight with me and kill me, then we will become your servants; but if I prevail against him and kill him, then you shall become our servants and serve us."
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: 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: Then Saul said to David, Blessed be thou, my son David: thou shalt both do great things, and also shalt still prevail. So David went on his way, and Saul returned to his place.
NASB: Then Saul said to David, "Blessed are you, my son David; you will both accomplish much and surely prevail." So David went on his way, and Saul returned to his place.
KJV: Now Jonathan and Ahimaaz stayed by Enrogel; for they might not be seen to come into the city: and a wench went and told them; and they went and told king David.
NASB: Now Jonathan and Ahimaaz were staying at En-rogel, and a maidservant would go and tell them, and they would go and tell King David, for they could not be seen entering the city.
KJV: Give therefore thy servant an understanding heart to judge thy people, that I may discern between good and bad: for who is able to judge this thy so great a people?
NASB: "So give Your servant an understanding heart to judge Your people to discern between good and evil. For who is able to judge this great people of Yours?"