"And they shall make an ark of acacia wood; two and a half cubits shall be its length, a cubit and a half its width, and a cubit and a half its height.
Exodus 25:10
Surrounding context
25:9 According to all that I show you, that is, the pattern of the tabernacle and the pattern of all its furnishings, just so you shall make it.
25:10 "And they shall make an ark of acacia wood; two and a half cubits shall be its length, a cubit and a half its width, and a cubit and a half its height.
25:11 And you shall overlay it with pure gold, inside and out you shall overlay it, and shall make on it a molding of gold all around.