Revelation 13:16-18.

"And he causes all , the small and the great, and the rich and the poor, and the free men and the slaves, to be given a mark on their right hand or on their forehead, and he provides that no one will be able to by or sell, except the one who has the mark, either the name of the beast or the number of his name. Here is wisdom. let him who has understandin calculate the number of the beast, for it is that of a man; and his number is six hundred and sixty-six.

 

God bless you.