Exodus 25:10 in the King James Version
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.
Context
9 According to all that I show you, the pattern of the tabernacle, and the pattern of all of its furniture, even so you shall make it.
10 “They shall make an ark of acacia wood. Its length shall be two and a half cubits, its width a cubit and a half, and a cubit and a half its height.
11 You shall overlay it with pure gold. You shall overlay it inside and outside, and you shall make a gold molding around it.