Genesis 8:8-11

8Then he sent out a dove to see if the water had receded from the surface of the ground. 9But 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. He reached out his hand and took the dove and brought it back to himself in the ark. 10He waited seven more days and again sent out the dove from the ark. 11When the dove returned to him in the evening, there in its beak was a freshly plucked olive leaf! Then Noah knew that the water had receded from the earth.