Hawzah News Agency – Five things are unlawful for a junub:

1- touching the writing of the Qur’an with any part of the body, or the name of Allah in whichever language it may be written; and it is better not to touch the names of Prophets, Imams, and Her Eminence [Fāṭimah] al-Zahrāʾ (peace be upon them) as well;

2- entering Masjid al-Ḥarām and the Mosque of the Prophet (Ṣ), even to the extent of entering from one door and exiting from another;

3- staying in other mosques; and similarly, based on obligatory precaution, staying in the shrines of the Imams (ʿA). However, there is no problem if a junub passes through a mosque; for example, by entering from one door and exiting from another;

4- entering a mosque in order to take something from it; and similarly, based on obligatory precaution, placing something in it even if he does not enter the mosque himself [but places something in it from outside];

5- reciting any of the verses for which sajdah is obligatory. These verses are found in four chapters (surahs) of the Qur’an:

a. Sūrat al-Sajdah (Chapter 32), verse 15;

b. Sūrat Fuṣṣilat (Chapter 41), verse 37;

c. Sūrat al-Najm (Chapter 53), verse 62;

d. Sūrat al-ʿAlaq (Chapter 96), verse 19.

Source: https://www.sistani.org/english/book/48/