Anas bin Maalik (radhi Allaahu anhu) said:  Verily the Prophet (salla Allahu alaihi wa sallam) said:

Whoever sends Salah upon me once Allah will send ten upon him and remove ten of his sins and raise his rank by ten levels.

Imam Ahmad in his Musnad
Imam Bukharee in Adabul Mufrad #642 and #643.
Jami Sagheer #6359 authenticated by Al Abaanee

Source for above image: Al- Adab al-Mufrad , published by UK Islamic Academy

 

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Abu  Muhammad  Ka`b  bin `Ujrah (May Allah be pleased with him) reported: The Prophet (sallallaahu ’alayhi wa sallam) came to us and we asked him, “O Messenger of Allah, we already know how to greet you (i.e., say As-salamu `alaikum), but how should we supplicate for you?” He (sallallaahu ’alayhi wa sallam) said,

“Say: `Allahumma salli `ala Muhammadin, wa `ala `ali Muhammadin, kama sallaita `ala `ali Ibrahima, innaka Hamidum Majid. Allahumma barik `ala Muhammadin, wa `ala `ali Muhammadin, kama barakta `ala `ali Ibrahima, innaka Hamidum Majid

[O Allah, exalt the mention of Muhammad and the family of Muhammad as you exalted the family of Ibrahim. You are Praised and Glorious. O Allah, bless Muhammad and the family of Muhammad as You blessed the family of Ibrahim. You are Praised and Glorious.”’

[Al-Bukhari and Muslim].