And when the children of Israel saw it, they said one to another, It is manna: for they knew not what it was. And Moses said unto them, This is the bread which the LORD has given you to eat.
All Commentaries on Exodus 16:15 Go To Exodus 16
Caesarius of Arles
AD 542
Manna is interpreted as “What is this?” See whether the very power of the name does not provoke you to learn it, so that when you hear the law of God read in church you may always ask and say to the teachers: What is this? This it is that the manna indicates. Therefore if you want to eat the manna, that is, if you desire to receive the word of God, know that it is small and very fine like the seed of the coriander.