Kays 198:23 :ܒܝܕ ܐܡܝ݂ܢܘ݂ܬ ܡܐܨܕܢܘ݂ܬܗ ܕܒܡܘܙܠܬܐ ܘܡ݂ܬܒܩܝܢܘ݂ܬܗ ܕܒܟܘ̈ܟܒܐ‏ : by means of constant fixation on the constellations and examining the stars
See the entire entry for maṣṣəḏānū, maṣṣəḏānūṯā n.f. fixing the eyes