The waters continued to recede until the tenth month. And on the first day of the tenth month, the tops of the mountains became visible.
After forty days Noah opened a window he had made in the ark and sent out a raven, and it kept flying back and forth until the water had dried up from the earth.
Then he sent out a dove to see if the water had receded from the surface of the ground.
But the dove could find nowhere to perch because there was water over all the surface of the earth; so it returned to Noah in the ark.
~ The Book of Genesis, Ch. 8:5-9