Do you mean sending peace and blessings be upon him?
Allah sends His Salat (Graces, Honours, Blessings, Mercy, etc.) on the Prophet (Muhammad SAW) and also His angels too (ask Allah to bless and forgive him). O you who believe! Send your Salat on (ask Allah to bless) him (Muhammad SAW), and (you should) greet (salute) him with the Islamic way of greeting (salutation i.e. AsSalamu 'Alaikum).
[Qur'an Ahzaab 33:56]
When you hear his name, you can say: sal Allaahu alayhi wa Salam.
