2 Samuel 9:1

And it came to pass, when he had made an end of speaking unto Saul, that the soul of Jonathan was knit with the soul of David, and Jonathan loved him as his own soul. And Saul took him that day, and would let him go no more home to his father's house. Then Jonathan and David made a covenant, because he loved him as his own soul. 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.

And thou shalt not only while yet I live show me the kindness of the LORD, that I die not: But also thou shalt not cut off thy kindness from my house for ever: no, not when the LORD hath cut off the enemies of David every one from the face of the earth. So Jonathan made a covenant with the house of David, saying, Let the LORD even require it at the hand of David's enemies. And Jonathan caused David to swear again, because he loved him: for he loved him as he loved his own soul.

And Jonathan Saul's son arose, and went to David into the wood, and strengthened his hand in God. And he said unto him, Fear not: for the hand of Saul my father shall not find thee; and thou shalt be king over Israel, and I shall be next unto thee; and that also Saul my father knoweth. And they two made a covenant before the LORD: and David abode in the wood, and Jonathan went to his house.

I am distressed for thee, my brother Jonathan: very pleasant hast thou been unto me: thy love to me was wonderful, passing the love of women.

But show kindness unto the sons of Barzillai the Gileadite, and let them be of those that eat at thy table: for so they came to me when I fled because of Absalom thy brother.

Thine own friend, and thy father's friend, forsake not; neither go into thy brother's house in the day of thy calamity: for better is a neighbour that is near than a brother far off.