9:113 It is not for the Prophet and those who believe to ask forgiveness for the polytheists, even though they should be near relatives, after it has become clear to them that they are companions of the flaming fire.
47:30 And if We please, We could show them to thee so that thou shouldst know them by their marks. And certainly thou canst recognize them by the tone of (their) speech. And Allah knows your deeds.
48:29 Muhammad is the Messenger of Allah ; and those with him are forceful against the disbelievers, merciful among themselves. You see them bowing and prostrating [in prayer]/humbling themselves/lowering themselves before truth (sjd), seeking bounty from Allah and [His] pleasure. Their mark is on their faces from the trace of prostration/humbling themselves. That is their description in the Torah. And their description in the Gospel is as a plant which produces its offshoots and strengthens them so they grow firm and stand upon their stalks, delighting the sowers - so that Allah may enrage by them the disbelievers. Allah has promised those who believe and do righteous deeds among them forgiveness and a great reward.
Also by their aura/energy field
