'Windows of Heaven' in the Bible

In the six hundredth year of the life of Noah, in the second month, on the seventeenth day of the month--on that day all the springs of the great deep were split open, and the windows of heaven were opened.

Bring the whole tithe to {the storehouse}, so that there will be food in my house, and test me please in this," says Yahweh of hosts, "if I will not open for you the windows of heaven, and pour forth for you {an overflowing blessing}.