What is the ruling on the one who does not prostrate with the imam?
Machine translationRead the Arabic original
Question:
If the imam rises from prostration before the ma'mum has prostrated, does the ma'mum repeat this rak'ah after the taslim?
Answer:
If he is delayed for an excuse, such as not hearing, he prostrates after him and his prayer is valid. However, if he intentionally delays behind the imam, his prayer is not valid. The imam is made to be followed, so when he says takbir, you say takbir; when he prostrates, you prostrate; when he bows, you bow. Yes.
If the imam rises from prostration before the ma'mum has prostrated, does the ma'mum repeat this rak'ah after the taslim?
Answer:
If he is delayed for an excuse, such as not hearing, he prostrates after him and his prayer is valid. However, if he intentionally delays behind the imam, his prayer is not valid. The imam is made to be followed, so when he says takbir, you say takbir; when he prostrates, you prostrate; when he bows, you bow. Yes.
Source
قناة «العلامة الدكتور صالح الفوزان»، ما حكم من لم يسجد مع الإمام؟ لمعالي الشيخ صالح الفوزان — youtube.com
The Arabic text is a machine transcription of the audio recording.