Yaseen - 36:70
It warns the living and exposes the disbelievers.
The Qur'an warns the living:
The Cattle/6:19
"Ask: "Whose testimony is the greatest?"Say: "Allah is the witness between me and you. I have been given this Qur´an to warn you and all those to whom it reaches. Do you bear witness that there is another god besides Allah?"Say: "I do not bear witness to that,"and then say: "He is the only God, and I am far from that which you associate partners with."