Prayer: Intention When Replying to Salaam
Practical Laws of Islam as per the teachings of Ayatullah Sistani
Ruling 1126
It is obligatory for a person who is performing prayers to reply to a salaam with the intention of greeting (taḥiyyah), and there is no problem if he also makes an intention of a duʿāʾ, i.e. he asks Allah the Exalted to grant good health to the person who said salaam to him.