'Root' in the Bible

Now if the first fruits [are] holy, [so] also [is] the [whole] batch of dough, and if the root [is] holy, [so] also [are] the branches.

Now if some of the branches were broken off, and you, [although you] were a wild olive tree, were grafted in among them and became a sharer of the root of the olive tree's richness,

do not boast against the branches. But if you boast against [them], you do not support the root, but the root [supports] you.

And again Isaiah says, "The root of Jesse will come, even the one who rises to rule over the Gentiles; in him the Gentiles will put their hope."