John 6:55
“For My flesh is true meat, and My blood is true drink.”
What is that He says? He either desires to declare that this is the true meat which saves the soul, or to assure them concerning what had been said, that they might not suppose the words to be a mere enigma or parable, but might know that it is by all means needful to eat the Body. Then He says,
Source: Homilies on the Gospel of John (New Advent)