Prayer: What Is the Ruling on Silent Recitation in Certain Prayers?

Practical Laws of Islam as per the teachings of Imam Khamenei

Prayer: What Is the Ruling on Silent Recitation in Certain Prayers?

English:

Question #456:

What is the rule regarding the prayers in which our recitation of al-Fātiḥah and the other chapter is not loud?

Answer #456:

It is obligatory for men to recite the chapter al-Fātiḥah and the other chapter loudly in the morning, maghrib, and ‘ishā’ prayers, and their prayer is void if they intentionally and knowingly recite them quietly, but if they do so unintentionally, out of ignorance, forgetfulness or for being unaware of the rule, their prayer is correct.

-Imam Khamenei, Practical Laws of Islam, Importance and Conditions of Prayer