John Chrysostom — as excerpted in the Catena Aurea on John 8:52-56

“(Hom. lv. 2) In answer then to their question, Art Thou greater than our father Abraham, He shews them that He is greater than Abraham; Your father Abraham rejoiced to see My day: he saw it, and was glad; he must have rejoiced, because My day would benefit him, which is to acknowledge Me greater than himself.”