Cross reference
Genesis 6:15
15 and this `is' that which thou dost with it: three hundred cubits `is' the length of the ark, fifty cubits its breadth, and thirty cubits its height;
Genesis 7:20
20 fifteen cubits upwards have the waters become mighty, and the mountains are covered;
Deuteronomy 3:11
11 for only Og king of Bashan had been left of the remnant of the Rephaim; lo, his bedstead `is' a bedstead of iron; is it not in Rabbath of the sons of Ammon? nine cubits its length, and four cubits its breadth, by the cubit of a man.