Revelation 11:3

And I will give to my two witnesses, and they shall prophesy one thousand two hundred and sixty days, surrounded with sackcloth.

Revelation 11:2

And the court-yard that without the temple throw out, and thou mayest not measure it: for it was given to the nations: and the holy city shall they tread under foot forty-two months.

Revelation 12:6

And the woman fled into the desert where she has a place prepared from God, that they might nourish her there a thousand two hundred and sixty days.

Genesis 37:34

And Jacob will rend his garments, and will put sackcloth upon his loins, and will mourn for his son many days.

Numbers 11:26

And two men remained in the camp, the name of the one Eldad, and the name of the second, Medad: and the spirit will encamp upon them; and they among those being written, and they will not go forth to the tent, and they will prophesy in the camp.

Deuteronomy 17:6

At the mouth of two witnesses or three witnesses they shall be put to death; they shall not die by the mouth of one witness.

Deuteronomy 19:15

One witness shall not rise up against a man for any iniquity, and for any sin, in any sin which he shall sin; by the mouth of two witnesses or by the mouth of three witnesses the word shall be established.

1 Chronicles 21:16

And David will lift up his eyes and see the messenger of Jehovah standing between the earth and between the heavens, and his sword drawn in his hand stretched forth over Jerusalem. And David will fall, and the old men being covered with sackcloth, upon their face.

Esther 4:1-2

And Mordecai knew all that was done, and Mordecai will rend his garments, and put on sackcloth and ashes, and he will go forth into the city, and he will cry out a great and bitter cry;

Job 16:15

I sewed together sackcloth upon my skin, and I thrust my horn into the dust.

Isaiah 22:12

And the Lord Jehovah of armies in that day will call to weeping and to wailing, and to baldness and to girding with sackcloth:

Lamentations 2:10

They sat upon the earth; the old men of the daughter of Zion were silent; they brought up the dust upon their head: they girded on sackcloth: the virgins of Jerusalem brought down their head to the earth.

Daniel 12:7

And I shall hear the man clothed with linen garments, who was above to the waters of the river, and he will lift up his right hand and his left to the heavens, and swear by him living forever, that for an appointment of appointments and a half; in the scattering of the hand of the holy people being finished, all these shall be finished.

Matthew 18:16

But if he hear thee not, take with thee yet one or two, that at the mouth of two or three witnesses every word might stand.

Luke 24:48

And ye are witnesses of these things.

John 3:5-8

Jesus says to him, Truly, truly, I say to thee, Except any one be born of water and of the Spirit, he cannot come into the kingdom of God.

John 3:27

John answered and said, No man can receive anything except it be given him from heaven.

John 15:27

And ye also testify, for ye are with me from the beginning.

Acts 1:8

But ye shall receive power, the Holy Spirit having come upon you: and ye shall be witnesses to me also in Jerusalem, and in all Judea, and Samaria, and even to the last of the earth.

Acts 2:32

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

Acts 3:15

And ye killed the Author of life, whom God raised from the dead; of whom we are witnesses.

Acts 13:31

Who was seen for many days to them having come up with him from Galilee to Jerusalem, who are his witnesses to the people.

1 Corinthians 12:28

And whom truly God set in the church, first the sent, second the prophets, third teachers, then powers, then graces of healings, helps, directions, kinds of tongues.

2 Corinthians 13:1

This third I come to you. By mouth of two witnesses, and three, shall every word be established.

Ephesians 4:11

And truly he gave the sent; and the prophets; and the bearers of good tidings; and the shepherds, and the teachers;

Revelation 1:5

And from Jesus Christ, the faithful witness, the first born from the dead, and the chief of the kings of the earth. To him having loved us, and washed us from our sins in his blood,

Revelation 13:5

And a mouth was given him speaking great things and blasphemies; and power was given him to make war forty-two months.

Revelation 19:10

And I fell before his feet to worship him. And he says to me, See, not: I am thy fellowservant, and of thy brethren having 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 them: and the souls of them beheaded with an axe for the testimony of Jesus, and for the word of God, and who worshipped not the wild beast, nor his image, and took not the stamp upon their foreheads, and upon 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, No man can receive anything except it be given him from heaven.
1 Corinthians 12:28
And whom truly God set in the church, first the sent, second the prophets, third teachers, then powers, then graces of healings, helps, directions, kinds of tongues.
Ephesians 4:11
And truly he gave the sent; and the prophets; and the bearers of good tidings; and the shepherds, and the teachers;

Witnesses

Revelation 20:4
And I saw thrones, and they sat upon them, and judgment was given them: and the souls of them beheaded with an axe for the testimony of Jesus, and for the word of God, and who worshipped not the wild beast, nor his image, and took not the stamp upon their foreheads, and upon their hands; and they lived and reigned with Christ a thousand years.
Luke 24:48
And ye are witnesses of these things.
John 15:27
And ye also testify, for ye are with me from the beginning.
Acts 1:8
But ye shall receive power, the Holy Spirit having come upon you: and ye shall be witnesses to me also in Jerusalem, and in all Judea, and Samaria, and even to the last of the earth.
Acts 2:32
This Jesus God raised up, of which all we are witnesses.
Acts 3:15
And ye killed the Author of life, whom God raised from the dead; of whom we are witnesses.
Acts 13:31
Who was seen for many days to them having come up with him from Galilee to Jerusalem, who are his witnesses to the people.

They shall

Revelation 19:10
And I fell before his feet to worship him. And he says to me, See, not: I am thy fellowservant, and of thy brethren having the testimony of Jesus: worship God: for the testimony of Jesus is the spirit of prophecy.

A thousand

Revelation 11:2
And the court-yard that without the temple throw out, and thou mayest not measure it: for it was given to the nations: and the holy city shall they tread under foot forty-two months.
Revelation 12:6
And the woman fled into the desert where she has a place prepared from God, that they might nourish her there a thousand two hundred and sixty days.

Clothed

Genesis 37:34
And Jacob will rend his garments, and will put sackcloth upon his loins, and will mourn for his son many days.
1 Chronicles 21:16
And David will lift up his eyes and see the messenger of Jehovah standing between the earth and between the heavens, and his sword drawn in his hand stretched forth over Jerusalem. And David will fall, and the old men being covered with sackcloth, upon their face.
Esther 4:1
And Mordecai knew all that was done, and Mordecai will rend his garments, and put on sackcloth and ashes, and he will go forth into the city, and he will cry out a great and bitter cry;
Job 16:15
I sewed together sackcloth upon my skin, and I thrust my horn into the dust.
Isaiah 22:12
And the Lord Jehovah of armies in that day will call to weeping and to wailing, and to baldness and to girding with sackcloth:
Lamentations 2:10
They sat upon the earth; the old men of the daughter of Zion were silent; they brought up the dust upon their head: they girded on sackcloth: the virgins of Jerusalem brought down their head to the earth.
John 3:5
Jesus says to him, Truly, truly, I say to thee, Except any one be born of water and of the Spirit, he cannot come into the kingdom of God.

General references

Genesis 37:34
And Jacob will rend his garments, and will put sackcloth upon his loins, and will mourn for his son many days.
Numbers 35:30
Every one striking a soul by the mouth of witnesses, he shall slay the slayer: and one witness shall not testify against a soul to die.
Romans 9:2
That there is great grief to me and continued pain in my heart.