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