It is better for the one who enters while the imam is in the final tashahhud
Machine translationRead the Arabic original
Question:
May Allah reward you, Shaykh. This questioner from the Arab Republic of Egypt says: I entered the mosque and found the worshippers in the final tashahhud. Should I sit with them, or wait for a congregation, or wait for another congregation?
Answer:
If there are people behind you, and you know that people are coming, then you wait for them and you pray in congregation. But if you do not know that anyone is coming, then you join the congregation in whatever remains of the prayer. Yes.
May Allah reward you, Shaykh. This questioner from the Arab Republic of Egypt says: I entered the mosque and found the worshippers in the final tashahhud. Should I sit with them, or wait for a congregation, or wait for another congregation?
Answer:
If there are people behind you, and you know that people are coming, then you wait for them and you pray in congregation. But if you do not know that anyone is coming, then you join the congregation in whatever remains of the prayer. Yes.
Source
قناة «العلامة الدكتور صالح الفوزان»، 5887- الأفضل لمن دخل والإمام في التشهد الأخير - الشيخ صالح الفوزان — youtube.com
The Arabic text is a machine transcription of the audio recording.