Theophylact of Ohrid — as excerpted in the Catena Aurea on Luke 22:19-20

“But first the bread is given, next the cup. For in spiritual things labour and action come first, that is, the bread, not only because it is toiled for by the sweat of the brow, but also because while being eaten it is not easy to swallow. Then after labour follows the rejoicing of Divine grace, which is the cup.”