7:17-20 The flood was increasing forty days. The waters rose so high, that the tops of the highest mountains were overflowed more than twenty feet. There is no place on earth so high as to set men out of the reach of God's judgments. God's hand will find out all his enemies, Ps 21:8. When the flood thus increased, Noah's ark was lifted up, and the waters which broke down every thing else, bore up the ark. That which to unbelievers betokens death unto death, to the faithful betokens life unto life.And the waters prevailed exceedingly on the earth,.... Yet more and more, so that the people without the ark were obliged to remove, not only from the lower to the higher rooms in their houses, and to the tops of them, but to the highest trees; and when these were bore down, to the highest hills and mountains; and to those it was in vain to fly, by what follows:

and all the high hills that were under the whole heaven were covered: whence it appears there were hills before the flood, and that these were not caused by it, and that the deluge was universal, since there was not a hill under the whole heaven but what was covered with it. In Deucalion's flood all men are said to perish, except a few who fled to the high mountains (n); which story seems to be hammered out of this account.

(n) Apollodorus, de Deor. Origin. l. 1. p. 19.