CPA Matt24:44 :ܗܘܘ ܥܝܪ̈ܝܢ ܕܒܫܥܬܐ ܕܠܝܬ̈ܬܘܢ ܡܣ̈ܟܝܢ‏ : be ready, for when you are not expecting it
See the entire entry for šāˁā, šāˁtā n.f. hour; moment of time