Context, Chapter 55
55:1 And after that the Head of Days repented and said: 'In vain have I destroyed all who dwell on the earth.'
55:2 And He sware by His great name: 'Henceforth I will not do so to all who dwell on the earth, and I will set a sign in the heaven: and this shall be a pledge of good faith between Me and them for ever, so long as heaven is above the earth. And this is in accordance with My command.' LV. 3-LVI.
55:3 When I have desired to take hold of them by the hand of the angels on the day of tribulation and pain because of this, I will cause My chastisement and My wrath to abide upon them, saith God, the Lord of Spirits.
55:4 Final Judgement of Azâzêl, the Watchers and their children.