Mark 15:33

And being the sixth hour, darkness was upon the whole earth till the ninth hour.

Matthew 27:45

And from the sixth hour, darkness was upon all the earth, even to the ninth hour.

Mark 15:25

And it was the third hour, and they crucified him:

Luke 23:44-45

And it was about the sixth hour, and darkness was upon all the earth till the ninth hour.

Psalm 105:28

He sent darkness, and he will darken; and they embittered not his words.

Isaiah 50:3-4

I will put darkness upon the heavens, and I will put sackcloth their covering.

Amos 8:9-10

And it was in that day, says the Lord Jehovah, I caused the sun to set at noon, and I darkened the light to the earth in that day:

Treasury of Scripture Knowledge

Summary

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

Bible References

When

Mark 15:25
And it was the third hour, and they crucified him:
Matthew 27:45
And from the sixth hour, darkness was upon all the earth, even to the ninth hour.
Luke 23:44
And it was about the sixth hour, and darkness was upon all the earth till the ninth hour.