Is it permissible to say for other than the prophets: So-and-so, peace and blessings be upon him?
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Question:
He says: Honorable Shaykh, may Allah grant you success, is it permissible to say for other than the prophets, "So-and-so, peace and blessings be upon him"? Because the woman said to the Prophet (peace and blessings be upon him), "Send blessings upon me and upon my husband."
Answer:
It is permissible, it is permissible to send blessings upon some of the believers, but this should not be adopted as a slogan, as is the case with the Rafidah, who single out 'Ali (peace be upon him) and say, or "peace and blessings be upon him." If this is a slogan for the people of innovation, it is not permissible. However, if a person says it at times without adopting it as a slogan, there is nothing wrong with it. Yes.
He says: Honorable Shaykh, may Allah grant you success, is it permissible to say for other than the prophets, "So-and-so, peace and blessings be upon him"? Because the woman said to the Prophet (peace and blessings be upon him), "Send blessings upon me and upon my husband."
Answer:
It is permissible, it is permissible to send blessings upon some of the believers, but this should not be adopted as a slogan, as is the case with the Rafidah, who single out 'Ali (peace be upon him) and say, or "peace and blessings be upon him." If this is a slogan for the people of innovation, it is not permissible. However, if a person says it at times without adopting it as a slogan, there is nothing wrong with it. Yes.
Source
قناة «العلامة الدكتور صالح الفوزان»، [1166 /1350] هل يجوز أن يقال لغير الأنبياء: فلان صلى الله عليه وسلم؟ الشيخ صالح الفوزان — youtube.com
The Arabic text is a machine transcription of the audio recording.