Question 645: What are those acts are haram for Junub (a person who is ritually impure)?
Answer 645: There are certain things which are forbidden for a person polluted (by discharge of semen) as follows:
Touching the words of the Quran.
Touching the Name of Allah, the Exalted and his other Names and His exclusive Attributes; likewise, to be more cautious, touching the names of the Prophets and the Imams, Peace be upon them.
Entering the Masjid-i Harâm (the Holy Mosque in Mecca) and the Masjid al-Nabi, Allah’s Blessing be on him and his Posterity, (the Holy Mosque in Medinah), even with the intention of just passing through.
Staying in Mosques besides the two Holy Mosques; rather entering them absolutely, except when a person passes through them, so that he enters from one door and exits from the other, or when he enters for fetching something from the mosque, in which case there is no objection. According to the more cautious opinion, to this are added the Holy shrines (of the Imãms), and more cautious than that is affiliating them with the two Holy Mosques, in the same way as the veranda (of the Holy shrines) is treated at par with the Holy Mausoleum.
Placing something in the mosques, whether done from outside or while passing through.
Reciting any of the four Chapters (Surahs) of the Quran (which make the performance of prostration obligatory), namely, lqra’, Al-Najam, Alif Lam Mim Tanzil and Ha Mim al-Sajdah, including even a part of these Chapters or even the Bismillàh with the intention of reciting any of them.
For further information on this issue, please refer to the following answers:
Index: Rules of prayers and fasting performed without ghusl, answer 034.
Index: Rules concerning Janabat during night or day time in the month of Ramadan, answer 394.
Index: Number of things which invalidate Wudu (ablution), answer 556.
 . Tawzih al-Masael of Maraja (with annotation of Imam Khomieni), Vol. 1, PG. 212; Tahrir al-Wasilah of Imam Khomieni, Vol. 1, Pg. 67, chapter on Things Forbidden for a Person Polluted by Discharge of Semen.