EphNis 29:8.2 :ܣܒܐ ܕܠܥ݂ܠܝܡ̈ܐ | ܡܠܐܐ ܒܥܝܪܘܬܗ‏ : the elder who tires out the youngsters with his vigil keeping
See the entire entry for ˁīrū, ˁīrūṯā n.f. vigilance