Acts 7:8
And God gave Abraham the Agreement which required circumcision [as an identifying mark] so when Abraham fathered Isaac he circumcised him when he was eight days old. Then Isaac had a son, Jacob; and Jacob had [as sons] the twelve patriarchs [i.e., ruling fathers of families].
Galatians 3:17
Here is what I am saying: The Agreement originally made by God [with Abraham], with its attending promises, was not canceled when the law of Moses was given some four hundred and thirty years later.
Hebrews 6:17
Since God wanted to show conclusively to those who would inherit the promise [i.e., Abraham and all of his spiritual descendants], how unchangeable His purpose was, He confirmed it with an oath.
Treasury of Scripture Knowledge did not add