IshDeut 129:4 :ܠܐ ܬܦܠܐ܂ ܗܢܘ܂ ܠܐ ܬܗܦܟ ܣܘ̈ܟܬܗ ܠܗܢܐ ܓܒܐ ܘܠܗ݀ܘ܃ ܐܝܟ ܕܠܐ ܬܪܦܐ ܒܗ ܡܕܡ‏ : do not p': i.e., do not turn its branches to one side and the other so as not to let anything fall loose
See the entire entry for ply#2 vb. to cleanse of lice; to scrutinize