Matthew 24:15-21
King James Version
15 When ye therefore shall see the abomination of desolation, spoken of by Daniel the prophet, stand in the holy place, (whoso readeth, let him understand:)
16 Then let them which be in Judaea flee into the mountains:
17 Let him which is on the housetop not come down to take any thing out of his house:
18 Neither let him which is in the field return back to take his clothes.
19 And woe unto them that are with child, and to them that give suck in those days!
20 But pray ye that your flight be not in the winter, neither on the sabbath day:
21 For then shall be great tribulation, such as was not since the beginning of the world to this time, no, nor ever shall be.
https://www.biblegateway.com/passage/?search=Matthew+24%3A15-21&version=KJV
Thank you!
Bear in mind my knowledge of scripture is quite limited, but from what I understand the mark isn’t something that will be imposed, that people will take it willingly.