Exodus 16:16
This is the thing which the LORD has commanded, Gather of it every man according to his eating, an omer for each one, according to the number of your persons; take ye each one for those who are in his tent.
Exodus 16:36
Now an omer is the tenth part of an ephah.
Exodus 16:18
And when they did measure it with an omer, he that gathered much had nothing over, and he that gathered little had no lack; they gathered each one according to his eating.
Exodus 16:32-33
And Moses said, This is what the LORD has commanded, Fill an omer of it to be kept for your descendants, that they may see the bread with which I have fed you in the wilderness when I brought you forth from the land of Egypt.