The ruling on one who prayed in a mosque containing a grave without knowing it
Machine translationRead the Arabic original
Question:
The questioner says: A man prayed in a mosque that contains a grave, and he did not know about it until after finishing the prayer, or after a day or two. Is his prayer valid, or is it obligatory for him to repeat the prayer?
Answer:
The safest course is to repeat the prayer; the safest course is that he repeats the prayer, because this prayer is prohibited. The Messenger (peace and blessings be upon him) prohibited praying at graves and prohibited making graves into mosques; indeed, he cursed the one who did so. This indicates that the prayer at graves is invalid, because prohibition implies invalidity. Yes, but since he did not know, he should repeat the prayer as a precaution. Yes.
The questioner says: A man prayed in a mosque that contains a grave, and he did not know about it until after finishing the prayer, or after a day or two. Is his prayer valid, or is it obligatory for him to repeat the prayer?
Answer:
The safest course is to repeat the prayer; the safest course is that he repeats the prayer, because this prayer is prohibited. The Messenger (peace and blessings be upon him) prohibited praying at graves and prohibited making graves into mosques; indeed, he cursed the one who did so. This indicates that the prayer at graves is invalid, because prohibition implies invalidity. Yes, but since he did not know, he should repeat the prayer as a precaution. Yes.
Source
قناة «العلامة الدكتور صالح الفوزان»، 26 من 64\شرح عمدة الأحكام (شرح كامل مع أسئلة)\الصلاة\الجنائز\صالح الفوزان\الفقه\كبار العلماء — youtube.com (59:52)
The Arabic text is a machine transcription of the audio recording.