Prayer: Doubting Whether Addressed in a Salaam to a Group
Practical Laws of Islam as per the teachings of Ayatullah Sistani
Ruling 1133
If a person says salām to a group of people and someone from among them who is performing prayers doubts whether the person who said salām intended to address him as well, he must not reply. Based on obligatory precaution, the same applies if he knows that he intended to address him as well but another person replied. However, if he knows that he intended to address him as well but another person does not reply, or he doubts whether another person replied, he must reply to him.