TgJ 1Sam24:18 :זַכַי אַת מִנִי אְרֵי אַת גְמַלתַנִי טָבְתָא וַאְנָ גְמַלתָך בִשתָא‏ : you are more righteous than I am, for you treated me well while I treated you badly
See the entire entry for gml vb. to repay