Kays 228:14 :ܘܗ݂ܢܘܢ ܠܗ̈ܓܐ܃ ܣ݁ܠܩܝܢ ܠܥܠ ܣ݁ܓܝ݂ ܘܡܬ݂ܡܛܝܢ ܥܕܡܐ ܠܐܬܝ݂ܪ ܢܘ݂ܪܢܐ‏ : those vapors rise up very high and reach the illuminated aether
See the entire entry for ˀatīr n.f. the aether