Exodus 10:21-23
21 And the Lord said unto Moses, Stretch out thine hand toward heaven, that there may be darkness over the land of Egypt, even darkness which may be felt.

22 And Moses stretched forth his hand toward heaven; and there was a thick darkness in all the land of Egypt three days:

23 They saw not one another, neither rose any from his place for three days: but all the children of Israel had light in their dwellings.

Isaiah 61:1-3
1 The Spirit of the Lord God is upon me; because the Lord hath anointed me to preach good tidings unto the meek; he hath sent me to bind up the brokenhearted, to proclaim liberty to the captives, and the opening of the prison to them that are bound;

2 To proclaim the acceptable year of the Lord, and the day of vengeance of our God; to comfort all that mourn;

3 To appoint unto them that mourn in Zion, to give unto them beauty for ashes, the oil of joy for mourning, the garment of praise for the spirit of heaviness; that they might be called trees of righteousness, the planting of the Lord, that he might be glorified.