Amazing Love!

King David remembers and honors the covenants he made with Jonathan and with Saul.
Mephibosheth is sent for and brought before David.
And David said, Is there yet any that is left of the house of Saul, that I may shew him kindness for Jonathan's sake?
~2 sam 9:1

And Jonathan said unto David, O Lord God of Israel, when I have sounded my father about to morrow any time, or the third day, and, behold, if there be good toward David, and I then send not unto thee, and shew it thee;
The Lord do so and much more to Jonathan: but if it please my father to do thee evil, then I will shew it thee, and send thee away, that thou mayest go in peace: and the Lord be with thee, as he hath been with my father.
And thou shalt not only while yet I live shew 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.
1 Sam 20:12-16