Berean Standard Bible (BSB)
And Jonathan had David reaffirm his vow out of love for him, for Jonathan loved David as he loved himself.
World English Bible (WEB)
Jonathan caused David to swear again, for the love that he had to him; for he loved him as he loved his own soul.
Strong's King James
And Jonathan{H3083} caused David{H1732} to swear{H7650}{(H8687)} again{H3254}{(H8686)}, because he loved{H160} him: for he loved{H157}{(H8804)} him as he loved{H160} his own soul{H5315}.
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The F.O.G Message *
Young's Literal Translation
and Jonathan addeth to cause David to swear, because he loveth him, for with the love of his own soul he hath loved him.