Question: What is your opinion regarding wearing an amulet or a Hijaab (preserver) containing some Aayaat of the Qur’aan? What I mean is: Is it permissible for a Muslim to carry a Hijaab that contains some Aayaat of the Qur’aan or not?
Answer: The Salaf (righteous predecessors) disagreed about the ruling on writing an Aayah of the Qur’aan or the whole Qur’aan and wearing it on the upper arm or elsewhere to protect against feared harm or to remove adversity… read more here.