Revelation 13:14-18 King James Version (KJV)
14 And deceiveth them that dwell on the earth by the means of those miracles which he had power to do in the sight of the beast; saying to them that dwell on the earth, that they should make an image to the beast, which had the wound by a sword, and did live.
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.
18 Here is wisdom. Let him that hath understanding count the number of the beast: for it is the number of a man; and his number is Six hundred threescore and six.
Revelation 13:14-18 Amplified Bible, Classic Edition (AMPC)
14 And because of the signs (miracles) which he is allowed to perform in the presence of the [first] beast, he deceives those who inhabit the earth, commanding them to erect a statue (an image) in the likeness of the beast who was wounded by the [small] sword and still lived.
15 And he is permitted [also] to impart the breath of life into the beast’s image, so that the statue of the beast could actually talk and cause to be put to death those who would not bow down and worship the image of the beast.
16 Also he compels all [alike], both small and great, both the rich and the poor, both free and slave, to be marked with an inscription [[a]stamped] on their right hands or on their foreheads,
17 So that no one will have power to buy or sell unless he bears the stamp (mark, inscription), [that is] the name of the beast or the number of his name.
18 Here is [room for] discernment [a call for the wisdom [b]of interpretation]. Let anyone who has intelligence (penetration and insight enough) calculate the number of the beast, for it is a human number [the number of a certain man]; his number is 666.
Revelation 13:14-18 Living Bible (TLB)
14 By doing these miracles, he was deceiving people everywhere. He could do these marvelous things whenever the first Creature was there to watch him. And he ordered the people of the world to make a great statue of the first Creature, who was fatally wounded and then came back to life. 15 He was permitted to give breath to this statue and even make it speak! Then the statue ordered that anyone refusing to worship it must die!
16 He required everyone—great and small, rich and poor, slave and free—to be tattooed with a certain mark on the right hand or on the forehead. 17 And no one could get a job or even buy in any store without the permit of that mark, which was either the name of the Creature or the code number of his name. 18 Here is a puzzle that calls for careful thought to solve it. Let those who are able, interpret this code: the numerical values of the letters in his name add to 666![a]