וַיְרַגֵּ֣ל בְּעַבְדְּךָ֔ אֶל־אֲדֹנִ֖י הַמֶּ֑לֶךְ וַאדֹנִ֤י הַמֶּ֙לֶךְ֙ כְּמַלְאַ֣ךְ הָאֱלֹהִ֔ים וַעֲשֵׂ֥ה הַטּ֖וֹב בְּעֵינֶֽיךָ׃
And he hath slandered thy servant unto my lord the king; but my lord the king is as an angel of God; do therefore what is good in thine eyes.
Read midrashic interpretation of II Samuel 19:28: and classical rabbinic exegesis.