'Root' in the Bible

Now if the firstfruits offered up are holy, so is the whole batch. And if the root is holy, so are the branches.

Now if some of the branches were broken off, and you, though a wild olive branch, were grafted in among them and have come to share in the rich root of the cultivated olive tree,

do not brag that you are better than those branches. But if you do brag—you do not sustain the root, but the root sustains you.

And again, Isaiah says:The root of Jesse will appear,the One who rises to rule the Gentiles;the Gentiles will hope in Him.