1Sa 20:42
All that is given of the conversation between the two friends is the parting word spoken by Jonathan to David: “Go in peace. What we two have sworn in the name of the Lord, saying, The Lord be between me and thee, and between my seed and thy seed for ever:” sc., let it stand, or let us abide by it. The clause contains an aposiopesis, which may be accounted for from Jonathan’s deep emotion, and in which the apodosis may be gathered from the sense. For it is evident, from a comparison of 1Sa 20:23, that the expression “for ever” must be understood as forming part of the oath. - 1Sa 21:1. David then set out upon his journey, and Jonathan returned to the town. This verse ought, strictly speaking, to form the conclusion of 1 Samuel 20.
The subject to “arose” is David; not because Jonathan was the last one spoken of (Thenius), but because the following words, “and Jonathan came,” etc., are in evident antithesis to “he arose and went.”