Genesis 7:6

Genesis 7:6. And Noah was six hundred years old when the flood of waters was upon the earth.

He was nearly five hundred years old when he began to preach about the flood, - a good old age to take up such a subject. For a hundred and twenty years he pursued his theme, - three times as long as most men are ever able to preach, and now at last God’s time of long-suffering is over, and he proves the truthfulness of the testimony of his servant by sending the flood that Noah had foretold.