Charles Spurgeon Commentary Genesis 8:14

"And in the second month, on the seven and twentieth day of the month, was the earth dry." — Genesis 8:14 (ASV)

On the seven and twentieth day of the month, was the earth dried.

The face of the ground was dry in the first month; the earth was dried, the second month. Noah might have thought it was dry enough before; but God did not think so, there was enough mud to breed a pestilence, so Noah must wait until God had made the earth ready for him.

And in the second month,

Nearly two months Noah waited for the complete drying of the earth.