Matthew 27:45

From the sixth hour there was darkness over all the land till the ninth hour.

Mark 15:33

And when the sixth hour had come, there was darkness over the whole land, till the ninth hour.

Luke 23:44

And it was about the sixth hour, and there was darkness over the whole land till the ninth hour.

Ephesians 1:9

by making known to us the mystery of his will according to his good purpose which he had before established in himself,

Ephesians 1:11

in him in whom we have obtained our portion, having been predestinated according to the purpose of him who works all things according to the counsel of his will,

Hebrews 7:21

(for those priests were made such without an oath, but this one with an oath, by him that said to him, The Lord swore, and will not repent, Thou art a priest forever after the order of Melchisedec;)

Revelation 6:12

And I saw when he had opened the sixth seal; and there was a great earthquake, and the sun became black as sackcloth of hair, and the moon became like blood:

Treasury of Scripture Knowledge

Summary

For this shall the earth mourn, and the heavens above be black: because I have spoken it, I have purposed it, and will not repent, neither will I turn back from it.

General references

Bible References

The heavens

Matthew 27:45
From the sixth hour there was darkness over all the land till the ninth hour.
Mark 15:33
And when the sixth hour had come, there was darkness over the whole land, till the ninth hour.
Luke 23:44
And it was about the sixth hour, and there was darkness over the whole land till the ninth hour.
Revelation 6:12
And I saw when he had opened the sixth seal; and there was a great earthquake, and the sun became black as sackcloth of hair, and the moon became like blood:

Because

Ephesians 1:9
by making known to us the mystery of his will according to his good purpose which he had before established in himself,
Hebrews 7:21
(for those priests were made such without an oath, but this one with an oath, by him that said to him, The Lord swore, and will not repent, Thou art a priest forever after the order of Melchisedec;)

General references

Mark 13:24
But in those days, after that affliction, the sun will be darkened, and the moon will not give her light,