Exodus 16:16

16:16 “This is what the Lord has commanded: ‘Each person is to gather from it what he can eat, an omer per person according to the number of your people; each one will pick it up for whoever lives in his tent.’”

Exodus 16:32-33

16:32 Moses said, “This is what the Lord has commanded: ‘Fill an omer with it to be kept for generations to come, so that they may see the food I fed you in the desert when I brought you out from the land of Egypt.’” 16:33 Moses said to Aaron, “Take a jar and put in it an omer full of manna, and place it before the Lord to be kept for generations to come.”