Ps-Clem Hom 10.252:22 :ܟܕ ܡܨܒܬܝܢ ܘܡܪܩܝܢ ܘܡܫܝܓܝܢ ܠܗܘܢ ܘܢܩܕܘܬܐ ܥ݁ܒܕܝܢ ܐܢܬܘܢ‏ : while you are adorning, scrubbing, and washing them and making them pure
See the entire entry for naqdū, naqdūṯā n.f. purity