INW 107 :ܗܲܘ ܡܐ ܕܐܝܬܘܗ݂ܝ ܫܸܩܝܐ ܠܢܨܒ̈ܬܐ܃ ܗܘ ܟܕ ܗܘ ܫܸܬܩܐ ܐܡܝܢܐ ܠܬܪܒܝܬܗ݀ ܕܝܕܥܬܐ‏ : What watering is to plants is the same as continual silence to the fostering of (spiritual) knowledge.
See the entire entry for tarbī, tarbīṯā n.f. education, upbringing