Tossefta sur La Genèse 7:11

The people of the [generation of] the Flood became haughty in front of the Place only due to the goodness that He showered upon them, as it says (Job 21:9-11): "Their homes are secure, without fear [and they do not feel the rod of God]. Their bull breeds and does not fail ... They let their infants run loose like sheep, etc." This was the cause of their [downfall]. And they said to God (Job 21:14-15): "Leave us alone ... What is Shaddai that we should serve Him?" They said, "Why does He trouble Himself with us? All we need are two drops of water. Behold, ours are the rivers and the springs with which we supply ourselves on hot summer days and on rainy days, as it is said (Gen 2:6), "But a surge would well up from the earth [and water all the face of the ground]." The Place said to them, "It was with goodness that I bestowed [all this] on you, and you come with haughtiness before me? I am coming to destroy you," as it is said (Gen. 6:17), "As for me, here, I am about to bring on the Deluge, water upon the earth, etc." Rabbi Yosei ben Dormaskit says, the people of the [generation of] the Flood became haughty in front of the Place only with the sphere (galgal) of the eye, which resembles water, as it says (Gen. 6:2), "And the b'nei ha'elohim ("the sons of the judges/nobles"; alt., "the sons of the divine beings") saw how beautiful the daughters of men were, etc." In the same way, the Holy One Blessed be He did not destroy them with anything but a gathering (galgal) of waters, which resembles the eye, as it is is said (Gen. 7:11), "On that day, all the fountains of the great deep burst apart [and the floodgates of the sky broke open]." (Note: Tanakh translations generally follow JPS.)