OS MtCur19:18 :ܛܪ ܦܘ̈ܩܕܢܐ܂ ܐܡܪ ܠܗ ܐܝܠܝܢ‏ : keep the commandments! He said to him "which?"
See the entire entry for ˀaylēn pron. who, which (pl.)