BT Pes 110b(2) :אדחננכי וחנני לא אתת לגו השתא דאתת לגו קרחנני וחננכי‏ : while he showed grace to you and to me I did not come into it, now that I have come into it he ... me and showed grace to you (words of incantation)
See the entire entry for ḥnn vb. to show mercy