DeMundo 149:5 :ܘܢܛܪܐ ܠܗ ܠܟܝܢܐ ܒܗ݀ ܕܠܐ ܣܝܒܘ‏ : (the earth) preserves the nature that is in it without aging
See the entire entry for saybū/sēḇū, saybūṯā/sēḇūṯā n.f. old age