AphDem7.136:7 :ܟܕ ܢܐܡܪ ܕܚܛܝܬ܂ ܘܢܒܥܐ ܬܝܒܘܬܐ‏ : when he says "I have sinned" and asks for clemency
See the entire entry for tyāḇū, tyāḇūṯā n.f. penitence