Genesis 7:12-20

12And rain fell on the earth forty days and forty nights. 13On that very day Noah and his sons, Shem, Ham and Japheth, together with his wife and the wives of his three sons, entered the ark. 14They had with them every wild animal according to its kind, all livestock according to their kinds, every creature that moves along the ground according to its kind and every bird according to its kind, everything with wings. 15Pairs of all creatures that have the breath of life in them came to Noah and entered the ark.

16The animals going in were male and female of every living thing, as God had commanded Noah. Then the LORD shut him in. 17For forty days the flood kept coming on the earth, and as the waters increased they lifted the ark high above the earth. 18The waters rose and increased greatly on the earth, and the ark floated on the surface of the water. 19They rose greatly on the earth, and all the high mountains under the entire heavens were covered. 20The waters rose and covered the mountains to a depth of more than fifteen cubits. That is, about 23 feet or about 6.8 meters Or rose more than fifteen cubits, and the mountains were covered