Prayer: Reciting Salawat
Practical Laws of Islam as per the teachings of Ayatullah Sistani
Ruling 1110
Whenever one says or hears the blessed name of His Eminence, the Messenger of Allah (Ṣ) – such as ‘Muḥammad’ and ‘Aḥmad’ – or an epithet (laqab) or kunyah[1] of his – such as ‘Muṣṭafā’ and ‘Abū al-Qāsim’ – even during prayers, it is recommended that he recite ṣalawāt.
-Ayatullah Sistani, Practical Laws of Islam, Prayer (Salah)
1
This is an appellation given to someone as the father or mother of someone.