Kays 256:5 :ܣܦܝ݂ܩܘ݂ܬܐ ܕܠܒܐ ܕܡ݂ܢ ܚܘ݂ܫ̈ܒܐ ܘܡܪ̈ܢܝܬܐ ܣܪ̈ܝ݂ܩܬܐ ܕܣܘ݂ܥܪ̈ܢܐ ܥ݁ܒܘܪ̈ܐ‏ : emptying the mind of worthless thoughts and attentions to passing events
See the entire entry for marnī, marnīṯā n.f. thought