2 Peter 2:4; 2 Peter 2:9; 2 Peter 2:17; 2 Peter 3:7

4 For if God spared not the angels that sinned , but cast them down to hell , and delivered them into chains of darkness, to be reserved unto judgment;
9 The Lord knoweth how to deliver the godly out of temptations, and to reserve the unjust unto the day of judgment to be punished :
17 These are wells without water, clouds that are carried with a tempest; to whom the mist of darkness is reserved for ever.
7 But the heavens and the earth, which are now, by the same word are kept in store , reserved unto fire against the day of judgment and perdition of ungodly men.