The goal is to register all citizens over the age of six. Biometric identification data will include fingerprints, hand geometry, earlobe geometry, retina and iris patterns, voice waves and DNA samples.
The bible says:
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 buy or to sell, except the one who has the mark, either the name of the beast or the number of his name.
(Revelation 13:16-17 NASB)