In Exodus 25, Moses is given the instructions for making the ark of testimony as well as the table and lampstand that will be in the Holy Place. In this chapter those things are put together and the details of materials and measurements are repeated.

Exodus 37

Bezaleel made the ark of acacia wood: two and a half cubits was the length of it, and a cubit and a half the width of it, and a cubit and a half the height of it: