IshDan 132(5) :ܘܠܐ ܡܘܕܥ ܠܐܢܫ܃ ܕܠܐ ܡܐܒܕ ܥܘܗܕܢܗܘܢ‏ : which he should not reveal to anyone lest he destroy their memory
See the entire entry for ˀbd vb. to be lost