salawat format

Sending prayers upon Prophet and His Ahlalbayt.

Useful information:
Muslims are commanded by the Holy Qur'an (33:56) to send their prayers upon the Holy Prophet Muhammad (pbuh&hf). The Holy Prophet (pbuh&hf) has indicated how to do this and also commands his followers to not send their prayers upon himself (pbuh&hf) alone but always to send their prayers simultaneously upon his family (pbut). The Holy Prophet (pbuh&hf) has said:
"Do not send me an amputated prayer." The companions asked: "What is an amputated prayer?" He said: "When you say, 'Allahumma, salli 'ala Muhammad' and stop. You should say, 'Allahumma, salli 'ala Muhammad wa al-i-Muhammad'."Yanabi' al-Muwaddah, 2:59; al-Sawa'iq al-Muhriqah, ibn Hajar, section 1 ch. 11

"Supplication will be intercepted (not accepted) until it is prayed upon the Prophet and his family."Yanabi' al-Muwaddah 2:59