Strong H520A אַמָּה 'ammâh · cubit

Genesis

1. Genesis 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.
2. Genesis 6:16
   A window shalt thou make to the ark, and in a cubit shalt thou finish it above; and the door of the ark shalt thou set in the side thereof; with lower, second, and third stories shalt thou make it.
3. Genesis 7:20
   Fifteen cubits upward did the waters prevail; and the mountains were covered.