What is the recommended prayer for sending salutations to Prophet Muhammad (saw) and Imam Ali (peace be upon them)?
 Narrated `Abdur-Rahman bin Abi Laila:                     Ka`b bin 'Ujra met me and said, "Shall I give you a present? Once the Prophet came to us and we said, 'O Allah's Apostle ! We know how to greet you; but how to send 'Salat' upon you? He said, 'Say: Allahumma Salli ala Muhammadin wa 'ala `Ali Muhammadin, kama sal-laita 'ala all Ibrahima innaka Hamidun Majid. Allahumma barik 'ala Muhammadin wa 'ala all Muhammadin, kama barakta 'ala all Ibrahima, innaka Hamidun Majid."