TgJ Jos23:6 :בְדִיל דְלָא לְמִסטֵי מִנֵיה לְיַמִינָא וְלִסמָאלָא‏ : so as not to stray from it to the right or to the left
See the entire entry for semmāl, semmālā; smāl, smālā n.m. left hand