Is a person sinful for leaving a plaque upon which is written the verse: "And whatever of blessings you have, it is from Allah," and two other plaques, on one of which is written the name of Allah "Allah" and on the other "Muhammad," in a room with a bad smell?

If leaving the Mus'haf (copy of the Qur'an) in a room leads to its desecration, then it is disliked to leave it there. Otherwise, there is no harm in doing so. It is disliked to write anything from the Glorious Qur'an on something that is likely to be discarded or desecrated. The questioner is advised to avoid the whispers of Satan.