TDN.72:7 :ܘܒܗ݀ ܒܡܠܦܢܘܬܐ ܠܐ ܢܡܠܠܘܢ ܒܛܝ̈ܠܬܐ‏ : they should not speak useless things in that instruction
See the entire entry for baṭṭīl adj. useless, void