AphDem3.45:19 :ܕܡܝܬܪܐ ܗܝ ܨܒܘܬܐ܂ ܕܐܢܫ ܢܕܟܐ ܠܒܗ‏ : for it is an excellent thing for a person to purify his heart
See the entire entry for ṣḇū, ṣḇūṯā n.f. desire; matter