Genesis 8:5-7

Young's Literal Translation

⁵ and the waters have been going and becoming lacking till the tenth month; in the tenth [month], on the first of the month, appeared the heads of the mountains.

⁶ And it cometh to pass, at the end of forty days, that Noah openeth the window of the ark which he made,

⁷ and he sendeth forth the raven, and it goeth out, going out and turning back till the drying of the waters from off the earth.