“And when the dew that lay was gone up, behold, upon the face of the wilderness there lay a small round thing, as small as the hoar frost on the ground. And when the children of Israel saw it, they said one to another, It is manna: for they wist not what it was. And Moses said unto them, This is the bread which the LORD hath given you to eat” (Exodus 16:14,15).
What precedent did today’s Scripture set in Israel’s national life?
After complaining about not having potable water in the desert, the Jews behold a miracle of God in Exodus 15:23-26—He provides them with drinking water. In chapter 16, they whine because of hunger. God thus furnishes them with manna and quail in verses 13-15 (today’s Scripture).
The word “manna” is actually derived from a Hebrew word meaning, “What is it?” Notice how our English Bible defines it in today’s Scripture: “It is manna: for they wist not what it was.” Manna was so unlike anything they had ever seen. It was certainly not a natural substance; it supernaturally rained down from Heaven. However, today’s Scripture identifies manna as “bread which the LORD hath given you to eat.” It was like coriander seed, white, and had a taste similar to that of wafers made with honey (Exodus 16:31).
Turning to John chapter 6, we read: “ Then Jesus said unto them, Verily, verily, I say unto you, Moses gave you not that bread from heaven; but my Father giveth you the true bread from heaven.  For the bread of God is he which cometh down from heaven, and giveth life unto the world.  Then said they unto him, Lord, evermore give us this bread.  And Jesus said unto them, I am the bread of life: he that cometh to me shall never hunger; and he that believeth on me shall never thirst.”
Did they recognize Jesus as “the bread of life?” No. When He entered Jerusalem riding on the donkey, fulfilling prophecy (Zechariah 9:9), they asked “Who is this?” in Matthew 21:10. “He was in the world, and the world was made by him, and the world knew [recognized] him not” (John 1:10). The Bible is amazing, huh? source