John Chrysostom

"For if the first-fruits be holy, the lump also is holy; and if the root be holy, so are the branches;"

So calling in this passage by the names of the first-fruit and root Abraham, and Isaac, and Jacob, the prophets, the patriarchs, all who were of note in the Old Testament; and the branches, those from them who believed. Then since the fact met him that many had disbelieved, observe how he undermines it again...