▁part ake ▁of ▁the ▁show b read , ▁because ▁their ▁daughters ▁will ▁be ▁married ▁into ▁the ▁priest hood . ▁ ▁Rav ▁Jud ah ▁taught ▁in ▁Rav ' s ▁name ▁that ▁the ▁words ▁of ▁ ▁( 5 : 1 2 ▁in ▁the ▁N J PS ), ▁“ Ob serve ▁the ▁S abb ath ▁day ▁. ▁. ▁. ▁as ▁the ▁Lord ▁your ▁God ▁commanded ▁you ” ▁( in ▁which ▁Mos es ▁used ▁the ▁past ▁t ense ▁for ▁the ▁word ▁“ command ed ,” ▁indicating ▁that ▁God ▁had ▁commanded ▁the ▁Israel ites ▁to ▁observe ▁the ▁S abb ath ▁before ▁the ▁revel ation ▁at ▁Mount ▁S ina i ) ▁indicate ▁that ▁God ▁commanded ▁the ▁Israel ites ▁to ▁observe ▁the ▁S abb ath ▁when ▁they ▁were ▁at ▁Mar ah , ▁about ▁which ▁ ▁reports , ▁“ There ▁He ▁made ▁for ▁them ▁a ▁stat ute ▁and ▁an ▁ordin ance .” ▁ ▁The ▁M ish nah ▁taught ▁that ▁every ▁act ▁that ▁viol ates ▁the ▁law ▁of ▁the ▁S abb ath ▁also ▁viol ates ▁the ▁law ▁of ▁a ▁festival , ▁except ▁that ▁one ▁may ▁prepare ▁food ▁on ▁a ▁festival ▁but ▁not ▁on ▁the ▁S abb ath . ▁ ▁The ▁T anna ▁De ve i ▁Eli y ahu ▁taught ▁that ▁if ▁you ▁live ▁by ▁the ▁command ment ▁establish ing ▁the ▁S abb ath ▁( in ▁ ▁( 2 0 : 8 ▁in ▁the ▁N J PS ) ▁and ▁ ▁( 5 : 1 2 ▁in ▁the ▁N J PS )), ▁then ▁( in ▁the ▁words ▁of ▁) ▁“ The ▁Lord ▁has ▁sw