In the name of Allah, We praise Him, seek His help and ask for His forgiveness. Whoever Allah guides none can misguide, and whoever He allows to fall astray, none can guide them aright. We bear witness that there is no one (no idol, no person, no grave, no prophet, no imam, no dai, nobody!) worthy of worship but Allah Alone, and we bear witness that Muhammad (saws) is His slave-servant and the seal of His Messengers.
Allah says in the Holy Quran Chapter 56 Surah Waqiah verse 77-79:
That this is a Glorious Quran, inscribed in a well-guarded Book, which none can touch, except the purified.
Although the above aayah is meant to state how the Quran is honored by the noble angels in the heavens; the scholars have opined that just as the Quran is honored in the heavens by the angels, so should it be honored on the earth…. And thus, one should touch it only when one is pure and clean.
Thus, it is always preferred to be in a state of wudu when one recites the Quran from the Book. But if one is reciting from memory, then there is no need to be in wudu. And if one is sexually impure, then he must not even touch the Quran, unless he purifies himself with a full bath or ‘ghusl’.
Whatever written of Truth and benefit is only due to Allah’s Assistance and Guidance, and whatever of error is of me. Allah Alone Knows Best and He is the Only Source of Strength.