Numbers 33:49

And they shall make an ark of shittim wood: two cubits and a half shall be the length thereof, and a cubit and a half the breadth thereof, and a cubit and a half the height thereof.

And Joshua the son of Nun sent out of Shittim two men to spy secretly, saying, Go view the land, even Jericho. And they went, and came into an harlot’s house, named Rahab, and lodged there.

And Bethpeor, and Ashdothpisgah, and Bethjeshimoth,

Therefore, behold, I will open the side of Moab from the cities, from his cities which are on his frontiers, the glory of the country, Bethjeshimoth, Baalmeon, and Kiriathaim,

And rams’ skins dyed red, and badgers’ skins, and shittim wood,

Thou shalt also make a table of shittim wood: two cubits shall be the length thereof, and a cubit the breadth thereof, and a cubit and a half the height thereof.