AGnEx 106.10 :ܡ݂ܢ ܗ݀ܝ ܕܐܬܡܠܝ ܩܕܡܝܗܘܢ ܢܩ݁ܫ ܗܘܐ܂ ܘܡܣܡܟ ܠܗܘܢ ܚܕ ܒܬܪ ܚܕ‏ : from the fact that on the previous day he had been banging (on the cup) in front of them
See the entire entry for ˀeṯmāl(y) adv. yesterday