If a traveler joins a congregation in the last part of the prayer, does he complete it or shorten it?

Question:
Also, among the points in this message sent by the brother Ahmad, he asks: If one who shortens the prayer catches up with the imam who is completing the prayer in the final sitting, does he complete it or pray only two rak'ahs?

Answer:
If a traveler joins an imam who is completing the prayer, he is required to complete it following his imam, even if he joins him in the last part of the prayer, or even if he joins him before the taslim. He is required to complete it following his imam, based on the saying of the Messenger (peace and blessings be upon him): meaning he follows him. Part of following him is that if a traveler prays behind a resident, he completes the prayer. It is not permissible for him to shorten the prayer in this case. This is one of the cases in which the traveler is required to complete the prayer. Yes.