SHMUEL ALEF 20

16 So Yonatan made Brit with the Bais Dovid, saying, Let Hashem even require it at the hands of the oyevim of Dovid. 17 And Yonatan caused Dovid to swear a shevua again, because he loved him; for he loved him with the ahavat nafsho (with the love of his own nefesh, self).