The ruling on the traveler who intended to shorten the prayer but the imam completed it

Question:
Honorable Shaykh, he says: I was traveling and I stopped for the 'Asr prayer and prayed 'Asr behind an imam. He says: I was traveling and I stopped for the 'Asr prayer and prayed 'Asr behind an imam, and I intended to shorten the prayer, but the imam completed the prayer. What is the ruling in this case?

Answer:
The ruling is that you complete the prayer following the imam. If the imam completes the prayer, whether he is a traveler or a resident, the resident is required to complete it, and the traveler is permitted to shorten it. However, if the imam completes it, then those behind him are required to complete it following their imam, as the Messenger of Allah (peace and blessings be upon him) said: . Therefore, it is not permissible for you to shorten the prayer while the imam completes it; that is a difference of opinion.
As for the reverse, where the follower completes the prayer and the imam shortens it, this is permissible. You pray behind one who shortens the prayer, and then when he concludes the prayer, you stand up and complete the prayer for yourself if shortening is not permissible for you. As the Prophet (peace and blessings be upon him) said to the people of Makkah in the year of the Conquest when he prayed with them: So when the Messenger of Allah (peace and blessings be upon him) concluded the prayer, they stood up and completed the prayer for themselves.
The result is that if a traveler prays behind a resident or one who completes the prayer, and a resident prays behind a traveler who shortens the prayer, then the resident completes the prayer after the imam’s salam.