And ye shall observe this thing for an ordinance to thee and to thy sons for ever.
Exodus 12:14
'And this day hath become to you a memorial, and ye have kept it a feast to Jehovah to your generations; -- a statute age-during; ye keep it a feast.
Genesis 17:8-10
8
and I have given to thee, and to thy seed after thee, the land of thy sojournings, the whole land of Canaan, for a possession age-during, and I have become their God.'
9
And God saith unto Abraham, 'And thou dost keep My covenant, thou and thy seed after thee, to their generations;
10
this [is] My covenant which ye keep between Me and you, and thy seed after thee: Every male of you [is] to be circumcised;