Exodus 16:17

15When 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.

16This 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.’”

17The children of Israel did so, and some gathered more, some less.

18When they measured it with an omer, he who gathered much had nothing over, and he who gathered little had no lack. They each gathered according to his eating.

19Moses said to them, “Let no one leave of it until the morning.”