Genesis 6:15

6:15 This is how you shall make it. The length of the ark will be three hundred cubits, the breadth of it fifty cubits, and the height of it thirty cubits.
-World English Bible

Other Translation

6:15 And this [is the fashion] which thou shalt make it [of]: The length of the ark [shall be] three hundred cubits, the breadth of it fifty cubits, and the height of it thirty cubits.
-King James Version