'Root' in the Bible

Now if the firstfruits of the dough are holy, so also is the whole mass; and if the root of a tree is holy, so also are the branches.

And if some of the branches have been pruned away, and you, although you were but a wild olive, have been grafted in among them and have become a sharer with others in the rich sap of the root of the olive tree,

beware of glorying over the natural branches. Or if you are so glorying, do not forget that it is not you who uphold the root: the root upholds you.

And again Isaiah says, "There shall be the Root of Jesse and One who rises up to rule the Gentiles. On Him shall the Gentiles build their hopes."