1 Samuel 19:5

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?)

1 Samuel 19:5 Meaning and Commentary

1 Samuel 19:5

For he did put his life in his hand
Exposed himself to the utmost danger, when no one in all the camp of Israel would do the like:

and slew the Philistine;
Goliath of Gath, who defied the armies of Israel; against him he went unarmed, only with his sling and stones, and fought him, and slew him:

and the Lord wrought a great salvation for all Israel;
by his hand, so that they were delivered from their enemies, who fled before them, and they pursued them, and got a complete victory over them:

thou sawest [it], and didst rejoice;
he was an eyewitness of David's going forth against the Philistine, and slaying him, and of all the happy effects of it, which then greatly affected him, and he could not forbear expressing great joy on that occasion:

wherefore then wilt thou sin against innocent blood, to slay David
without a cause?
and so entail the guilt of it on himself and family.

1 Samuel 19:5 In-Context

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.

7 And so Jonathan called David, and showed to him all these words (and told him all these things). And Jonathan brought in David to Saul, and he was before him as [he was] yesterday and the third day ago.