2 Peter 3:6

So, then, brethren, having received no small occasion to repent, while we have opportunity, let us turn to God who called us, while yet we have One to receive us. For if we renounce these indulgences and conquer the soul by not fulfilling its wicked desires, we shall be partakers of the mercy of Jesus. Know ye that the day of judgment draweth nigh like a burning oven, and certain of the heavens and all the earth will melt, like lead melting in fire; and then will appear the hidden and manifest deeds of men. Good, then, is alms as repentance from sin; better is fasting than prayer, and alms than both; “charity covereth a multitude of sins,” and prayer out of a good conscience delivereth from death. Blessed is every one that shall be found complete in these; for alms lightens the burden of sin.

There are many allusions to the last judgment in the Psalms, but for the most part only casual and slight. I cannot, however, omit to mention what is said there in express terms of the end of this world: “In the beginning hast Thou laid the foundations of the earth, O Lord; and the heavens are the work of Thy hands. They shall perish, but Thou shall endure; yea, all of them shall wax old like a garment; and as a vesture Thou shall change them, and they shall be changed: but Thou art the same, and Thy years shall not fail.” Why is it that Porphyry, while he lauds the piety of the Hebrews in worshipping a God great and true, and terrible to the gods themselves, follows the oracles of these gods in accusing the Christians of extreme folly because they say that this world shall perish? For here we find it said in the sacred books of the Hebrews, to that God whom this great philosopher acknow …

30. “They shall perish, but Thou shalt endure” ( ver. 26 ). The Apostle Peter saith this openly: “By the word of God the heavens were of old,” etc. He hath said then that the heavens have already perished by the flood: and we know that the heavens perished as far as the extent of this atmosphere of ours. For the water increased, and filled the whole of that space in which birds fly; thus perished the heavens that are near the earth; those heavens which are meant when we speak of the birds of heaven. But there are heavens of heavens higher than these in the firmament: but whether these also shall perish by fire, or those only which perished also by the flood, is a much harder question among the learned, nor can it easily, especially in a limited space of time, be explained. Let us therefore dismiss or put it off; nevertheless, let us know that these things perish, and that God endureth.…