IshIsa 10:3 :ܩܕܝܫ܃ ܘܫܠܝܢ܂ ܘܟܢ ܩܥܝܢ ܩܕܝܫ܂ ܘܟܢ ܡܩܦܝܢ ܗ݀ܝ ܕܡܪܝܐ ܘܕܫܪܟܐ‏ : (they cry out) "holy" and stop, and then cry out "holy", and then add that part pertaining to "Lord", etc
See the entire entry for kén adv. thus, so