"15 And he had power to give life unto the image of the beast, that the image of the beast should both speak, and cause that as many as would not worship the image of the beast should be killed.
16 And he causeth all, both small and great, rich and poor, free and bond, to receive a mark in their right hand, or in their foreheads:
17 And that no man might buy or sell, save he that had the mark, or the name of the beast, or the number of his name."
https://www.biblegateway.com/passage/?search=Revelation%2013&version=KJV
"The tribulation of the Dajjal will be the most momentous religio-political event in human history, greater in magnitude than even the persecution of the Israelites by Pharaoh or the 20th century Holocaust.
‘Imran ibn Husayn reported: The Messenger of Allah, peace and blessings be upon him, said:
مَا بَيْنَ خَلْقِ آدَمَ إِلَى قِيَامِ السَّاعَةِ خَلْقٌ أَكْبَرُ مِنْ الدَّجَّالِ
Nothing between the creation of Adam until the establishment of the Hour is a greater tribulation than the affair of the False Messiah.
Source: Ṣaḥīḥ Muslim 2946, Grade: Sahih
For this reason, the Prophet (ṣ) encouraged us to seek refuge in Allah from the trial of the Dajjal after every prayer."
https://www.abuaminaelias.com/fitnah-al-masiha-al-dajjal/
"19For in those days shall be affliction, such as was not from the beginning of the creation which God created unto this time, neither shall be. 20And except that the Lord had shortened those days, no flesh should be saved: but for the elect's sake, whom he hath chosen, he hath shortened the days."
https://biblehub.com/kjv/mark/13.htm
"21 For then there will be great tribulation, such as has not been since the beginning of the world until this time, no, nor ever shall be. 22 And unless those days were shortened, no flesh would be saved; but for the [a]elect’s sake those days will be shortened."
https://www.biblegateway.com/passage/?search=Matthew%2024:15-22&version=NKJV
"13And one of the elders answered, saying unto me, What are these which are arrayed in white robes? and whence came they? 14And I said unto him, Sir, thou knowest. And he said to me, These are they which came out of great tribulation, and have washed their robes, and made them white in the blood of the Lamb. 15Therefore are they before the throne of God, and serve him day and night in his temple: and he that sitteth on the throne shall dwell among them. 16They shall hunger no more, neither thirst any more; neither shall the sun light on them, nor any heat. 17For the Lamb which is in the midst of the throne shall feed them, and shall lead them unto living fountains of waters: and God shall wipe away all tears from their eyes"
https://biblehub.com/kjv/revelation/7.htm