Áyat us Salát
In this verse, the Muslims are commanded to send salutations (Salawát) on the Holy Prophet (S) and his progeny (A). Alláh says:
Verily Alláh and His angels bless the Prophet;
O you who believe! Call for (divine) blessings on him and salute him with a proper salutation. (al Ahzáb, 33:56)
When the Holy Prophet (S) was asked how to send a proper salutation he replied, say
O Alláh, send your blessings on Muhammad and his progeny.