Exodus 16:32-36

32Moses said, “This is what the Lord has commanded: ‘Let an omer of it be kept throughout your generations, so that they may see the bread with which I fed you in the wilderness, when I brought you out of the land of Egypt.’” 33And Moses said to Aaron, “Take a ajar, and put an omer of manna in it, and place it before the Lord to be kept throughout your generations.” 34As the Lord commanded Moses, so Aaron placed it before bthe testimony to be kept. 35The people of Israel cate the manna forty years, till they came to a habitable land. They ate the manna till dthey came to the border of the land of Canaan. 36(An omer is ethe tenth part of an ephah.)
An  ephah was about 3/5 bushel or 22 liters


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