'Root' in the Bible

If the first portion of the dough offered is holy, then the whole batch is holy, and if the root is holy, so too are the branches.

Now if some of the branches were broken off, and you, a wild olive shoot, were grafted in among them and participated in the richness of the olive root,

do not boast over the branches. But if you boast, remember that you do not support the root, but the root supports you.

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