OS MtCur15:4 :ܘܡܢ ܕܡܨܚܐ ܠܐܒܘܗܝ ܐܘ ܠܐܡܗ ܢܬܩܛܠ‏ : whoever curses his father or mother shall be killed
See the entire entry for ṣḥy#2 vb. D to curse, to revile