▁Fox ▁of ▁Clark ▁University ▁noted ▁that ▁“ gl ory ” ▁( , ▁ke vod ) ▁and ▁“ st ub born ness ” ▁( , ▁k aved ▁lev ) ▁are ▁leading ▁words ▁throughout ▁the ▁book ▁of ▁Ex od us ▁that ▁give ▁it ▁a ▁sense ▁of ▁unity . ▁Similarly , ▁Pro pp ▁identified ▁the ▁root ▁kv d ▁— ▁con not ing ▁heav iness , ▁glory , ▁wealth , ▁and ▁firm ness ▁— ▁as ▁a ▁rec urr ing ▁theme ▁in ▁Ex od us : ▁ ▁Mos es ▁suffered ▁from ▁a ▁heavy ▁mouth ▁in ▁ ▁and ▁heavy ▁arms ▁in ▁ ▁Ph ara oh ▁had ▁firm ness ▁of ▁heart ▁in ▁▁▁ 2 8 ; ▁▁ 3 4 ; ▁and ▁ ▁Ph ara oh ▁made ▁Israel ' s ▁labor ▁heavy ▁in ▁ ▁God ▁in ▁response ▁sent ▁heavy ▁pl agues ▁in ▁▁▁ 1 8 , ▁ 2 4 ; ▁and ▁ ▁so ▁that ▁God ▁might ▁be ▁gl or ified ▁over ▁Ph ara oh ▁in ▁▁ 1 7 , ▁and ▁ 1 8 ; ▁and ▁the ▁book ▁cul min ates ▁with ▁the ▁descent ▁of ▁God ' s ▁fier y ▁Gl ory , ▁described ▁as ▁a ▁“ he avy ▁cloud ,” ▁first ▁upon ▁S ina i ▁and ▁later ▁upon ▁the ▁Tab ern acle ▁in ▁▁▁▁▁ 2 2 ; ▁and ▁ ▁Ex od us ▁chapter ▁ 2 0 ▁Although ▁Jewish ▁tradition ▁came ▁to ▁consider ▁the ▁words ▁“ I ▁am ▁the ▁Lord ▁your ▁God ” ▁in ▁ ▁the ▁first ▁of ▁the ▁Ten ▁Command ments , ▁many ▁modern ▁sch ol ars ▁saw ▁not ▁a ▁command