GregOr 41 24.2.8 : ܘܠܬܡܝܢܝܘܬܐ ܘܠܗ݀ܝ ܕܬܠ̈ܬܝܢ‏ : also for the number eight and that of thirty
See the entire entry for tmīnāyū, tmīnāyūṯā n.f. being eighth