IshPs 159(29) :ܕܢܚܘܐ ܕܗ݂ܘ ܠܐ ܣ݁ܐܒ ܘܠܐ ܡܫܬܚܠܦܐ ܒܪܘܬܗ ܐܟܘܬܢ‏ : to show that he does not age and his being a son does not change like us
See the entire entry for brū, brūṯā n.f. sonship