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.

God made a special agreement with Abraham through circumcision. Abraham had a son named Isaac, who was circumcised on the eighth day. Isaac later had a son named Jacob, who then had twelve important children.

King James Version

Simple English

* Work in progress - there may be occasional inaccuracies