is doing salat to prophet(pbuh)ie.ya nabi salamu alaikkum together in chorus in congregation allowed?please give relevant ahadith or quranic verse.jazakallah

All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger. We ask Allaah to exalt his mention as well as that of his family and all his companions.

Asking Allaah to honor the Prophet and exalt his mention is of a great virtue in the Sight of Allaah as He Says (what means): {Allaah sends His Salat (Graces, Honours, Blessings, Mercy, etc.) on the Prophet (Muhammad and also His angels too (ask Allaah to bless and forgive him). O you who believe! Send your Salat on (ask Allaah to exalt his mention) him, and greet him with the Islamic way of greeting}[Quran 33:56]. Moreover, the Prophet said: "Whoever asks Allaah to exalt my mention one time, Allaah will exalt his mention ten times." [Muslim] For more benefit, please refer to Fataawa 87365, 86784 and 85981.

As for asking Allaah to exalt the mention of the Prophet in congregation in one voice saying: ''Ya nabi Assalaamu Alaykum'' there are many matters about it:

1-     This is only saying Assalaamu Alaykum on the Prophet without asking Allaah to exalt his mention; this is of course if we consider that there is an omission in your statement which is the name of Allaah, which means that you intended to say: ''Salaam of Allaah on you''. Merely saying Assalaamu Alaykum without asking Allaah to exalt his mention is contrary to the above verse in which Allaah ordered us to combine asking Allaah to exalt his mention along with Salaam, which is asking Allaah to render him free from derogatory things. This is also contradictory to the authentic texts about asking Allaah to exalt the mention of the Prophet . In addition, the Salaf [the scholars of our righteous predecessors ] never did that practice, rather they used to combine between the two. As a matter of fact, when the companions were first ordered to ask Allaah to exalt his mention they inquired from the Prophet to teach them how to do that and he did. It is reported that Ka'b Ibn 'Ujrah narrated that a man asked the Prophet : ''Oh Messenger of Allaah! We were taught how Salaam is done, but we do not know how to ask Allaah to exalt your mention. Thereupon, the Prophet said: "Say: Allaahumma Salli 'alaa Muhammad, wa'alaa aali Muhammad, Kamaa Sallayta 'alaa Ibraaheem wa'alaa aali Ibraaheem, innaka Hameedun Majeed. Wabaarik 'alaa Muhammad wa'alaa aali Muhammad, Kamaa Baarakta 'alaa Ibraaheem wa'alaa aali Ibraaheem, innaka Hameedun Majeed." [O Allaah! Exalt the mention of Muhammad and the household of Muhammad as You did exalt the mention of Ibraaheem and the household of Ibraaheem, You are The Praiseworthy, The Glorious. O Allaah! Send blessings upon Muhammad and the household of Muhammad as You sent blessings upon Ibraaheem and the household of Ibraaheem. You are The Praiseworthy, The Glorious]."

2-     Asking Allaah to exalt the mention of the Prophet in congregation in the manner which you described is an innovation, and a practice that is not reported from any one among the Salaf, and therefore, it is not permissible.

3-     If you intend by your statement ''Ya nabiyu Allaah'': seeking help from him then this is not permissible, as he said: "Do not seek my help, but seek the Help of Allaah." [At-Tabaraani]

For more benefit, please refer to Fatwa 82593.

Allaah Knows best.