Exodus 16:15 in the King James Version
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.
Context
14 When the dew that lay had gone, behold, on the surface of the wilderness was a small round thing, small as the frost on the ground.
15 When the children of Israel saw it, they said to one another, “What is it?” For they didn’t know what it was. Moses said to them, “It is the bread which the LORD has given you to eat.
16 This is the thing which the LORD has commanded: ‘Gather of it everyone according to his eating; an omer a head, according to the number of your persons, you shall take it, every man for those who are in his tent.’”