IshDeut 133:21 :ܢܦܩܘ ܠܗܘܢ ܡܢ ܕܟܝܘܬܐ ܕܒܪܘܬܐ ܕܐܠܗܐ܃ ܘܫܢܝܘ ܠܘܬ ܥܒܕܘܬܐ ܕܫܐ̈ܕܐ‏ : they left the purity of God's sonship and moved toward the servitude of the demons
See the entire entry for brū, brūṯā n.f. sonship