Genesis 7:18-20

Young's Literal Translation

¹⁸ and the waters are mighty, and multiply exceedingly upon the earth; and the ark goeth on the face of the waters.

¹⁹ And the waters have been very very mighty on the earth, and covered are all the high mountains which [are] under the whole heavens;

²⁰ fifteen cubits upwards have the waters become mighty, and the mountains are covered;