Genesis 7:20

“Fifteen cubits upwards did the waters prevail, etc.] Either to such an height above the earth, upwards from that, or from the high hills; for though the words do not necessarily imply that, yet it may be allowed, since there was water enough to cover the highest of them; and fifteen cubits of water were enough to drown the tallest man, or largest beast that should be upon the top of any of them: and the mountains were covered, with water, even it may be allowed fifteen cubits high; nor will this furnish out so considerable an objection to the history of the flood as may be thought at first sight, since the highest mountains are not near so high as they are by some calculated. Sir Walter…”

“Fifteen cubits upward . . . and the mountains were covered--twenty-two and a half feet above the summits of the highest hills. The language is not consistent with the theory of a partial deluge.”

“The prevalence of the waters. The forty days are now completed. And at the end of this period the ark had been afloat for a long time. It was drifted on the waters in the direction in which they were flowing, and toward what was formerly the higher ground. Genesis 7:19 Upon the land. - The land is to be understood of the portion of the earth’s surface known to man. This, with an unknown margin beyond it, was covered with the waters. But this is all that Scripture warrants us to assert. Concerning the distant parts of Europe, the continents of Africa, America, or Australia, we can say nothing. “All the high hills were covered.” Not a hill was above water within the horizon of the spectator or…”

“The mountains were covered - Therefore there were mountains before the flood. Genesis 7:21”

“and the mountains: Psa 104:6; Jer 3:23 Genesis 7:21”