NET
8 Then God gave Abraham the covenant of circumcision, and so he became the father of Isaac and circumcised him when he was eight days old, and Isaac became the father of Jacob, and Jacob of the twelve patriarchs.
Darby
8 And he gave to him [the] covenant of circumcision; and thus he begat Isaac and circumcised him the eighth day; and Isaac Jacob, and Jacob the twelve patriarchs.
KJV
8 And he gave him the covenant of circumcision: and so [Abraham] begat Isaac, and circumcised him the eighth day; and Isaac [begat] Jacob; and Jacob [begat] the twelve patriarchs.