מַה־יּוֹסִ֨יף ע֥וֹד דָּוִ֛יד אֵלֶ֖יךָ לְכָב֣וֹד אֶת־עַבְדֶּ֑ךָ וְאַתָּ֖ה אֶֽת־עַבְדְּךָ֥ יָדָֽעְתָּ׃
What can David say yet more unto Thee concerning the honour which is done to Thy servant? for Thou knowest Thy servant.
Read midrashic interpretation of I Chronicles 17:18: and classical rabbinic exegesis.