Ps-Clem Recogs 1.10:12 :ܘܗܘ ܕܝܢ ܕܚܩ ܗܘܐ ܡܢܗ ܠܪܣܘܬܗܘܢ‏ : but he ignored their foolish talk
See the entire entry for lersū, lersūṯā n.f. jesting