Moses said, “This is what the LORD has commanded: ‘Keep an omer of manna for the generations to come, so that they may see the bread I fed you in the wilderness when I brought you out of the land of Egypt.’”
Moses says the Lord commands an omer of manna to be kept for future generations, so they may see the bread that fed Israel in the wilderness after Egypt.
This verse gives the memorial purpose of the preserved manna.
31Now the house of Israel called the bread manna. It was white like coriander seed and tasted like wafers made with honey. 32Moses said, “This is what the LORD has commanded: ‘Keep an omer of manna for the generations to come, so that they may see the bread I fed you in the wilderness when I brought you out of the land of Egypt.’” 33So Moses told Aaron, “Take a jar and fill it with an omer of manna. Then place it before the LORD to be preserved for the generations to come.” 34And Aaron placed it in front of the Testimony, to be preserved just as the LORD had commanded Moses. 35The Israelites ate manna forty years, until they came to a land where they could settle; they ate manna until they reached the border of Canaan. 36(Now an omer is a tenth of an ephah.)