'Patriarchs' in the Bible

For this reason Moses has given you [God’s law regarding] circumcision (not that it originated with Moses, but with the patriarchs) and you circumcise a man [even] on the Sabbath.

And God gave Abraham a covenant [a formal agreement to be strictly observed] of [which] circumcision [was the sign]; and so [under these circumstances] Abraham became the father of Isaac, and circumcised him on the eighth day; and Isaac [became the father] of Jacob, and Jacob [became the father] of the twelve patriarchs.

“The [ten elder] patriarchs, overwhelmed with jealousy, sold [their younger brother] Joseph into [slavery in] Egypt; but God was with him,

To them belong the patriarchs, and from them, according to His natural descent, came the Christ (the Messiah, the Anointed), He who is exalted and supreme over all, God blessed forever. Amen.

If the first portion [of dough offered as the first fruits] is holy, so is the whole batch; and if the root (Abraham, the patriarchs) is holy, so are the branches (the Israelites).