Is it prescribed to make du'a' (supplication) in prostration with other than what was reported from the Prophet (peace and blessings be upon him)?
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Question:
Honorable Shaykh, may Allah grant you success. He says: I hear many of the worshippers reciting certain supplications, whether in bowing or in prostration, that were not reported from the Prophet (peace and blessings be upon him). Is this prescribed?
Answer:
If the supplications are in agreement with what is in the Qur'an and the Sunnah, there is no harm, even if their exact wording was not reported, provided their meaning is in agreement with what was reported. There is no objection to that. Yes.
Honorable Shaykh, may Allah grant you success. He says: I hear many of the worshippers reciting certain supplications, whether in bowing or in prostration, that were not reported from the Prophet (peace and blessings be upon him). Is this prescribed?
Answer:
If the supplications are in agreement with what is in the Qur'an and the Sunnah, there is no harm, even if their exact wording was not reported, provided their meaning is in agreement with what was reported. There is no objection to that. Yes.
Source
قناة «العلامة الدكتور صالح الفوزان»، [267 -582] هل يشرع الدعاء في السجود بغير ما ورد عن النبي ﷺ؟ - الشيخ صالح الفوزان — youtube.com
The Arabic text is a machine transcription of the audio recording.