This is a promise from God never to flood the earth again.

Jesus promised to never flood the earth again. Here is what He said to Noah. 

"And I, behold, I establish my covenant with you, and with your seed after you;

And with every living creature that is with you, and of the fowl, of the cattle, and of every beast of the earth with you; from all that go out of the ark, to every beast of the earth.

And I will establish my covenant; neither shall all flesh be cut off any more by the waters of a flood; neither shall there any more be a flood to destroy the earth.

And God said, This is the token of the covenant which I make between me and you and every living creature that is with you, for perpetual generations:

I do set my bow in the cloud, and it shall be for a token of a covenant between me and the earth.

And it shall come to pass, when I bring a cloud over the earth, that the bow shall be seen in the cloud:

And I will remember my covenant, which is between me and you and every living creature of all flesh; and the waters shall no more become a flood to destroy all flesh.

And the bow shall be in the cloud; and I will look upon it, that I may remember the everlasting covenant between God and every living creature of all flesh that is upon the earth. 

And God said unto No'-ah, This is the token of the covenant, which I have established between me and all flesh that is upon the earth." Genesis 9:9-17