'Root' in the Bible

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).

But if some of the branches were broken off, and you [Gentiles], being like a wild olive shoot, were grafted in among them to share with them the rich root of the olive tree,

do not boast over the [broken] branches and exalt yourself at their expense. If you do boast and feel superior, remember that it is not you who supports the root, but the root that supports you.

Again Isaiah says,“There shall be a root of Jesse,He who arises to rule [as King] over the Gentiles,In Him shall the Gentiles hope.”