OS MtSin26:67 :ܐܚܪܢܐ ܕܝܢ ܡܫ̈ܩܦܝܢ ܗܘܘ ܦܟܘ̈ܗܝ‏ : while others were beating his cheeks(!)
See the entire entry for šqp#2 vb. to strike