TSK · 1 Samuel 23:18

It happened, when he had made an end of speaking to Saul, that the soul of Jonathan was knit with the soul of David, and Jonathan loved him as his own soul.

Jonathan said to David, "Yahweh, the God of Israel, [be witness]: when I have sounded my father about this time tomorrow, [or] the third day, behold, if there be good toward David, shall I not then send to you, and disclose it to you?

Jonathan said to David, "Go in peace, because we have both sworn in the name of Yahweh, saying, 'Yahweh shall be between me and you, and between my seed and your seed, forever.'" He arose and departed; and Jonathan went into the city.

David said, "Is there yet any who is left of the house of Saul, that I may show him kindness for Jonathan's sake?"