Exodus 37:1

And they made ten curtains for the tabernacle;

And Bezaleel made the ark of shittim wood: two cubits and a half was the length of it, and a cubit and a half the breadth of it, and a cubit and a half the height of it:

Bezalel made the ark of acacia wood. Its length was two and a half cubits, and its width a cubit and a half, and a cubit and a half its height.