Ps-Clem Recogs 1.46:13 :ܗ݀ܝ ܕܐܝܢ ܒܫܪܪܐ ܫܘܒܩܢܐ ܕܚ̈ܛܗܐ ܝܗܒܐ‏ : that which actually truly provides forgiveness of sins
See the entire entry for ˀēn interj. yes