The traveler catches the last two rak'ahs with a resident imam
Machine translationRead the Arabic original
Question:
He says: If a traveler catches up with the resident imam in the last two rak'ahs, does he say the taslim with him with the intention of shortening the prayer?
Answer:
No, he is required to complete the prayer. Whoever prays with an imam who completes the prayer is required to complete it, even if he did not join him until just before the taslim. This is the Sunnah. Yes.
He says: If a traveler catches up with the resident imam in the last two rak'ahs, does he say the taslim with him with the intention of shortening the prayer?
Answer:
No, he is required to complete the prayer. Whoever prays with an imam who completes the prayer is required to complete it, even if he did not join him until just before the taslim. This is the Sunnah. Yes.
Source
نور على الدرب - الفوزان - 03/264 — archive.org (14:24)
The Arabic text is a machine transcription of the audio recording.