Now at the time that Saul saw David going out against the Philistines, he said to Abner, the captain of the army: Of what family is this young man descended, Abner? And Abner said: As thy soul liveth, O king, I know not.
וְכִרְא֨וֹת שָׁא֜וּל אֶת־דָּוִ֗ד יֹצֵא֙ לִקְרַ֣את הַפְּלִשְׁתִּ֔י אָמַ֗ר אֶל־אַבְנֵר֙ שַׂ֣ר הַצָּבָ֔א בֶּן־מִי־זֶ֥ה הַנַּ֖עַר אַבְנֵ֑ר וַיֹּ֣אמֶר אַבְנֵ֔ר חֵֽי־נַפְשְׁךָ֥ הַמֶּ֖לֶךְ אִם־יָדָֽעְתִּי׃
One Church Father comments on this verse
How is it that Saul did not recognize David? (1 Sam. 17:55) This can be understood by considering one of two possibilities: either Saul, consumed by madness, failed to identify the one who played the harp, or his animosity compelled him to ask specifically about David's origins.
Passages read together with this verse.
THEOSIS