9 Then God said to Abraham, “As for you, you must keep my covenant, you and your descendants after you for the generations to come.

Read Genesis 17:9 Using Other Translations

And God said unto Abraham, Thou shalt keep my covenant therefore, thou, and thy seed after thee in their generations.
And God said to Abraham, "As for you, you shall keep my covenant, you and your offspring after you throughout their generations.
Then God said to Abraham, “Your responsibility is to obey the terms of the covenant. You and all your descendants have this continual responsibility.