PagPhil.219.8 :ܒܬܪܗ ܕܝܢ ܬܪܝܢܘܬܐ ܘܬܠܝܬܝܘܬܐ‏ : after him, then, duality and trinity
See the entire entry for trayyānū, trayyānūṯā n.f. duality