Exodus 16:34-36

New International Version - UK

³⁴ As the Lord commanded Moses, Aaron put the manna with the tablets of the covenant law, that it might be preserved. ³⁵ The Israelites ate manna for forty years, until they came to a land that was settled; they ate manna until they reached the border of Canaan.

³⁶ (An omer is one tenth of an ephah.)