1 Samuel 19:3-7

And as for me, I will go out and stand beside my father in the field where you are hiding, and I will speak with my father about you; and whatever I find out, I will tell you.”

Then Jonathan spoke well of David to his father Saul and said to him, “May the king not sin against his servant David, since he has not sinned against you, and since his deeds have been very beneficial to you.

For he took his life in his hand and struck the Philistine, and the Lord brought about a great victory for all Israel; you saw it and rejoiced. Why then would you sin against innocent blood by putting David to death for no reason?”

Saul listened to the voice of Jonathan, and Saul vowed, “As the Lord lives, David shall not be put to death.”

Then Jonathan called David, and Jonathan told him all these words. And Jonathan brought David to Saul, and he was in his presence as before.