KJV : And ye shall observe <08104> (8804) this thing <01697> for an ordinance <02706> to thee and to thy sons <01121> for <05704> ever <05769>.

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NASB : "And you shall observe this event as an ordinance for you and your children forever.

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NASB# : "And you shall observe<8104> this<2088> event<1697> as an ordinance<2706> for you and your children<1121> forever<5704><5769>.