Isaiah 50:3

I clothe the heavens with blackness, as in Egypt, Exodus 10:21, and I make sackcloth their covering, the garment of mourning, whose color was dark. Since the Lord was the absolute Master of the elements, it was an easy matter for Him to protect Israel from the wrath of the enemies and to overthrow the tyrants everywhere. Yea, more: this was only a minor consideration, for the Lord had a complete salvation for His people in mind through the obedience of His Servant, who is now introduced as speaking.