KJV : He smote <05221> (8686) also all the firstborn <01060> in their land <0776>, the chief <07225> of all their strength <0202>.NASB : He also struck down all the firstborn in their land, The first fruits of all their vigor.NASB# : He also struck<5221> down<5221> all<3605> the firstborn<1060> in their land<776>, The first<7225> fruits<7225> of all<3605> their vigor<202>.