Revelation 11:3

And I will give power unto my two witnesses, and they shall prophesy a thousand two hundred and three score days, clothed in sackcloth.

Revelation 11:2

But the court which is outside the temple leave out, and measure it not; for it is given unto the Gentiles: and the holy city shall they tread under foot forty and two months.

Revelation 12:6

And the woman fled into the wilderness, where she has a place prepared by God, that they should feed her there a thousand two hundred and three score days.

Genesis 37:34

And Jacob tore his clothes, and put sackcloth upon his loins, and mourned for his son many days.

Numbers 11:26

But there remained two of the men in the camp, the name of the one was Eldad, and the name of the other Medad: and the spirit rested upon them; and they were of them that were listed, but went not out unto the tabernacle: and they prophesied in the camp.

Deuteronomy 17:6

At the mouth of two witnesses, or three witnesses, shall he that is worthy of death be put to death; but at the mouth of one witness he shall not be put to death.

Deuteronomy 19:15

One witness shall not rise up against a man for any iniquity, or for any sin, in any sin that he sins: at the mouth of two witnesses, or at the mouth of three witnesses, shall the matter be established.

1 Chronicles 21:16

And David lifted up his eyes, and saw the angel of the LORD stand between the earth and the heaven, having a drawn sword in his hand stretched out over Jerusalem. Then David and the elders of Israel, who were clothed in sackcloth, fell upon their faces.

Esther 4:1-2

When Mordecai perceived all that was done, Mordecai tore his clothes, and put on sackcloth with ashes, and went out into the midst of the city, and cried with a loud and a bitter cry;

Job 16:15

I have sewed sackcloth upon my skin, and laid my strength in the dust.

Isaiah 22:12

And in that day did the Lord GOD of hosts call for weeping, and for mourning, and for baldness, and for girding with sackcloth:

Lamentations 2:10

The elders of the daughter of Zion sit upon the ground, and keep silence: they have cast up dust upon their heads; they have girded themselves with sackcloth: the virgins of Jerusalem hang down their heads to the ground.

Daniel 12:7

And I heard the man clothed in linen, who was above the waters of the river, when he held up his right hand and his left hand unto heaven, and swore by him that lives forever that it shall be for a time, times, and a half; and when he shall have accomplished the shattering of the power of the holy people, all these things shall be finished.

Matthew 18:16

But if he will not hear you, then take with you one or two more, that in the mouth of two or three witnesses every word may be established.

Luke 24:48

And you are witnesses of these things.

John 3:5-8

Jesus answered, Verily, verily, I say unto you, Except a man be born of water and of the Spirit, he cannot enter into the kingdom of God.

John 3:27

John answered and said, A man can receive nothing, except it be given him from heaven.

John 15:27

And you also shall bear witness, because you have been with me from the beginning.

Acts 1:8

But you shall receive power, after the Holy Spirit has come upon you: and you shall be witnesses unto me both in Jerusalem, and in all Judea, and in Samaria, and unto the uttermost part of the earth.

Acts 2:32

This Jesus has God raised up, of which we all are witnesses.

Acts 3:15

And killed the Prince of life, whom God has raised from the dead; of which we are witnesses.

Acts 13:31

And he was seen many days of them who came up with him from Galilee to Jerusalem, who are his witnesses unto the people.

1 Corinthians 12:28

And God has set some in the church, first apostles, secondarily prophets, thirdly teachers, after that miracles, then gifts of healings, helpers, administrators, various kinds of tongues.

2 Corinthians 13:1

This is the third time I am coming to you. In the mouth of two or three witnesses shall every word be established.

Ephesians 4:11

And he gave some, apostles; and some, prophets; and some, evangelists; and some, pastors and teachers;

Revelation 1:5

And from Jesus Christ, who is the faithful witness, and the first begotten of the dead, and the prince of the kings of the earth. Unto him that loves us, and washed us from our sins in his own blood,

Revelation 13:5

And there was given unto him a mouth speaking great things and blasphemies; and power was given unto him to continue forty and two months.

Revelation 19:10

And I fell at his feet to worship him. And he said unto me, See you do it not: I am your fellow servant, and of your brethren that have the testimony of Jesus: worship God: for the testimony of Jesus is the spirit of prophecy.

Revelation 20:4

And I saw thrones, and they sat upon them, and judgment was given unto them: and I saw the souls of them that were beheaded for the witness of Jesus, and for the word of God, and who had not worshiped the beast, neither his image, neither had received his mark upon their foreheads, or in their hands; and they lived and reigned with Christ a thousand years.

Treasury of Scripture Knowledge

Summary

And I will give power unto my two witnesses, and they shall prophesy a thousand two hundred and threescore days, clothed in sackcloth.

They shall

Bible References

I will give power, etc

John 3:27
John answered and said, A man can receive nothing, except it be given him from heaven.
1 Corinthians 12:28
And God has set some in the church, first apostles, secondarily prophets, thirdly teachers, after that miracles, then gifts of healings, helpers, administrators, various kinds of tongues.
Ephesians 4:11
And he gave some, apostles; and some, prophets; and some, evangelists; and some, pastors and teachers;

Witnesses

Revelation 20:4
And I saw thrones, and they sat upon them, and judgment was given unto them: and I saw the souls of them that were beheaded for the witness of Jesus, and for the word of God, and who had not worshiped the beast, neither his image, neither had received his mark upon their foreheads, or in their hands; and they lived and reigned with Christ a thousand years.
Luke 24:48
And you are witnesses of these things.
John 15:27
And you also shall bear witness, because you have been with me from the beginning.
Acts 1:8
But you shall receive power, after the Holy Spirit has come upon you: and you shall be witnesses unto me both in Jerusalem, and in all Judea, and in Samaria, and unto the uttermost part of the earth.
Acts 2:32
This Jesus has God raised up, of which we all are witnesses.
Acts 3:15
And killed the Prince of life, whom God has raised from the dead; of which we are witnesses.
Acts 13:31
And he was seen many days of them who came up with him from Galilee to Jerusalem, who are his witnesses unto the people.

They shall

Revelation 19:10
And I fell at his feet to worship him. And he said unto me, See you do it not: I am your fellow servant, and of your brethren that have the testimony of Jesus: worship God: for the testimony of Jesus is the spirit of prophecy.

A thousand

Revelation 11:2
But the court which is outside the temple leave out, and measure it not; for it is given unto the Gentiles: and the holy city shall they tread under foot forty and two months.
Revelation 12:6
And the woman fled into the wilderness, where she has a place prepared by God, that they should feed her there a thousand two hundred and three score days.

Clothed

Genesis 37:34
And Jacob tore his clothes, and put sackcloth upon his loins, and mourned for his son many days.
1 Chronicles 21:16
And David lifted up his eyes, and saw the angel of the LORD stand between the earth and the heaven, having a drawn sword in his hand stretched out over Jerusalem. Then David and the elders of Israel, who were clothed in sackcloth, fell upon their faces.
Esther 4:1
When Mordecai perceived all that was done, Mordecai tore his clothes, and put on sackcloth with ashes, and went out into the midst of the city, and cried with a loud and a bitter cry;
Job 16:15
I have sewed sackcloth upon my skin, and laid my strength in the dust.
Isaiah 22:12
And in that day did the Lord GOD of hosts call for weeping, and for mourning, and for baldness, and for girding with sackcloth:
Lamentations 2:10
The elders of the daughter of Zion sit upon the ground, and keep silence: they have cast up dust upon their heads; they have girded themselves with sackcloth: the virgins of Jerusalem hang down their heads to the ground.
John 3:5
Jesus answered, Verily, verily, I say unto you, Except a man be born of water and of the Spirit, he cannot enter into the kingdom of God.

General references

Genesis 37:34
And Jacob tore his clothes, and put sackcloth upon his loins, and mourned for his son many days.
Numbers 35:30
Whoever kills any person, the murderer shall be put to death by the mouth of witnesses: but one witness shall not testify against any person to cause him to die.
Romans 9:2
That I have great heaviness and continual sorrow in my heart.