OS LkCur17:3 :ܐܢ ܚܛܐ ܐܚܘܟ ܟܐܝ ܒܗ܂ ܐܢ ܬܒ ܫܒܘܩ ܠܗ‏ : if your brother sins, rebuke him; if he recants, forgive him
See the entire entry for ḥṭy vb. to sin