Exodus 16:35

16:35 Now the Israelites ate manna forty years, until they came to a land that was inhabited; they ate manna until they came to the border of the land of Canaan.

Exodus 30:4

30:4 You are to make two gold rings for it under its border, on its two flanks; you are to make them on its two sides. The rings will be places for poles to carry it with.