The ruling on shortening the prayer behind an imam who completes it
Machine translationRead the Arabic original
Question:
He says: Honorable Shaykh, this questioner was traveling, and he joined an imam who was praying the midday prayer. Then the imam stood up for the third unit, so I completed my tashahhud and said the closing salam. Is my action valid?
Answer:
No. If you pray behind someone who completes the prayer, it is obligatory for you to complete it, even if you are traveling, because you have the ruling of the imam. They said, the Prophet (peace and blessings be upon him) said: “The imam is appointed to be followed.” So it is not permissible to shorten the prayer behind an imam who completes it. Yes.
He says: Honorable Shaykh, this questioner was traveling, and he joined an imam who was praying the midday prayer. Then the imam stood up for the third unit, so I completed my tashahhud and said the closing salam. Is my action valid?
Answer:
No. If you pray behind someone who completes the prayer, it is obligatory for you to complete it, even if you are traveling, because you have the ruling of the imam. They said, the Prophet (peace and blessings be upon him) said: “The imam is appointed to be followed.” So it is not permissible to shorten the prayer behind an imam who completes it. Yes.
Source
نور على الدرب - الفوزان - 02/276 — archive.org (3:20)
The Arabic text is a machine transcription of the audio recording.