Is it permissible for a traveler to shorten the prayer if he prays behind someone who completes it?
Machine translationRead the Arabic original
Question:
He says: Honorable Shaykh, may Allah grant you success. I was traveling and I joined the imam in the final tashahhud and I shortened the prayer, and I knew that he had completed it as four rak'ahs. Is there any issue with my prayer?
Answer:
Yes, it is not valid. It is obligatory for you to pray it as four rak'ahs if you pray behind someone who completes the prayer, even if you join him at the end. You must complete it. Yes.
He says: Honorable Shaykh, may Allah grant you success. I was traveling and I joined the imam in the final tashahhud and I shortened the prayer, and I knew that he had completed it as four rak'ahs. Is there any issue with my prayer?
Answer:
Yes, it is not valid. It is obligatory for you to pray it as four rak'ahs if you pray behind someone who completes the prayer, even if you join him at the end. You must complete it. Yes.
Source
قناة «العلامة الدكتور صالح الفوزان»، هل يجوز للمسافر أن يقصر إذا صلى خلف من يُتِم؟ للشيخ صالح الفوزان — youtube.com
The Arabic text is a machine transcription of the audio recording.