EphPar 15:1.3 :ܘܟܕ ܠܝܬ ܬܚܦܝܬܐ ܘܠܐ ܥܠܬܐ ܥܒܝܬܐ ܟܣܝܐ ܗܝ ܐܦ ܓܠܝܐ ܒܡܫܒܗ‏ : even though (the wind) is hidden, having no covering nor thick substance, it is still revealed by its blowing
See the entire entry for ˁellā, ˁellṯā n.f. pretext, occasion