1 Samuel 20:41-42

(41) And as soon as the lad was gone, David arose out of a place toward the south, and fell on his face to the ground, and bowed himself three times: and they kissed one another, and wept one with another, until David exceeded. (42) And Jonathan said to David, Go in peace, forasmuch as we have sworn both of us in the name of the LORD, saying, The LORD be between me and thee, and between my seed and thy seed forever. And he arose and departed: and Jonathan went into the city.

The sweetest instruction from this parting interview, (for they knew not that they should ever see one another again) is the recollection of that everlasting covenant, in which all the people of God are included. That precious promise made by Jehovah to the person of the Lord Jesus, the great Head of his people, is of everlasting efficacy: As for me, saith the Lord, this is my covenant with them: my Spirit that is upon thee, and my words which I have put in thy mouth, shall not depart out of thy mouth, nor out of the mouth of thy seed, nor out of the mouth of thy seed's seed, saith the Lord, from henceforth and forever. Isaiah 59:21. This became the security in the parting of Jonathan and David. And the same is the everlasting security of the faithful, in all the separations made in life, or death, among the Lord's heritage. Children may die; friends may forsake us, we may be bereaved of all earthly things we hold dear; but, the Lord is the Rock of ages, and his mercy endureth forever.