IshPs 112(9) :ܒܪܝܪܘܬܐ ܕܝܢ ܒܙܒܢ ܠܦܫܝܛܘܬܐ ܩ݁ܪܐ܃ ܘܒܙܒܢ ܠܗܕܝܘܛܘܬܐ ܘܠܐ ܡܕܪܫܘܬܐ‏ : sometimes he calls simplicity b' and sometimes unlearned-ness and lack of erudition
See the entire entry for brīrū, brīrūṯā n.f. simplicity, stupidity