1 Samuel 19:4

4 Then Jonathan spake good things of David to Saul, his father, and said to him, King, do thou not sin against thy servant David, for he hath not sinned to thee, and his works be full good to thee; (Then Jonathan spoke good things about David to his father Saul, and said to him, O king, do not thou sin against thy servant David, for he hath not sinned against thee, and his works be very good towards thee;)

1 Samuel 19:4 Meaning and Commentary

1 Samuel 19:4

And Jonathan spake good of David unto Saul his father
Observed to him what a good man be was, and what good things he had done, what wisdom and prudence he had shown in the management of all his affairs, what valour and courage in all his expeditions, what faithfulness and integrity to his king and country in every instance:

and said unto him, let not the king sin against his servant, against
David;
by taking away his life; which would have been a great sin indeed, a sin against the law of God, which forbids murder, and which would have been attended with sad aggravations of cruelty and ingratitude:

because he hath not sinned against thee;
had not disobeyed any of his orders, but faithfully served him in everything, and much less ever thought to take away his life, or seize his crown, as he might imagine:

and because his works [have been] to thee-ward very good;
by slaying the Philistines, when he and his army were in the utmost terror; by driving away the evil spirit from him, through playing on his harp before him; as well as by commanding his troops, and leading them against the Philistines, and obtaining victory over them.

1 Samuel 19:4 In-Context

2 certainly Jonathan, the son of Saul, loved David greatly. And Jonathan showed to David, and said, Saul, my father, seeketh to slay thee; wherefore, I beseech, keep thyself tomorrow early; and thou shalt dwell privily, and thou shalt be hid. (but Jonathan, Saul's son, greatly loved David. And Jonathan told David, My father Saul seeketh to kill thee; and so, I beseech thee, be careful tomorrow morning; remain thou in secret, and be thou hid.)

3 And I shall go out, and stand beside my father in the field, wherever he shall be; and I shall speak of thee to my father, and whatever thing I shall see/and whatever thing I shall understand of him, I shall tell thee (and whatever I shall learn from him, I shall tell thee).

4 Then Jonathan spake good things of David to Saul, his father, and said to him, King, do thou not sin against thy servant David, for he hath not sinned to thee, and his works be full good to thee; (Then Jonathan spoke good things about David to his father Saul, and said to him, O king, do not thou sin against thy servant David, for he hath not sinned against thee, and his works be very good towards thee;)

5 and he putted his life in his hand, and he killed the Philistine. And the Lord made great help to all Israel; thou sawest, and were glad; why therefore sinnest thou in guiltless blood, and wilt slay David, that is without guilt? (and he put his life in his hands, and he killed the Philistine. And the Lord won a great victory for all Israel; thou sawest this, and wast glad; and so why sinnest thou against innocent blood, and wilt kill David, who is without guilt?)

6 And when Saul had heard this, he was pleased with the speaking of Jonathan, and he swore, (As) The Lord liveth, for David shall not be slain.