Jonathan knew David was God's chosen king, yet he loved him, protec…

Now the son of Saul was Jonathan.

1 Samuel 14:49 (KJV)

And Jonathan climbed up upon his hands and upon his feet, and his armourbearer after him: and they fell before Jonathan; and his armourbearer slew after him.

1 Samuel 14:13 (KJV)

If they say thus unto us, Tarry until we come to you; then we will stand still in our place, and will not go up unto them. But if they say thus, Come up unto us; then we will go up: for the LORD hath delivered them into our hand.

1 Samuel 14:10 (KJV)

And Jonathan stripped himself of the robe that was upon him, and gave it to David, and his garments, even to his sword, and to his bow, and to his girdle.

1 Samuel 18:4 (KJV)

And Jonathan caused David to swear again, because he loved him: for he loved him as he loved his own soul. Then Saul said to Jonathan… wherefore shall he be slain? And Jonathan shewed him all these things.

1 Samuel 20 (KJV)

And Jonathan answered Saul his father, and said unto him, Wherefore shall he be slain? what hath he done?… for he did put his life in his hand, and slew the Philistine, and the LORD wrought a great salvation for all Israel.

1 Samuel 19:4 (KJV)