Ambrose of Milan

But he who receives Christ into his inner chamber, is fed with the greatest delights of overflowing pleasures. The Lord therefore willingly enters, and reposes in his affection; but again the envy of the treacherous is kindled, and the form of their future punishment is prefigured; for while all the faithful are feasting in the kingdom of heaven, the faithless will be cast out hungry. Or, by this is denoted the envy of the Jews, who are afflicted at the salvation of the Gentiles.