He missed a rak'ah with the congregation and the imam added a rak'ah out of forgetfulness; should he follow the imam to complete what he missed?
Machine translationRead the Arabic original
Question:
A man entered a four-rak'ah prayer and missed a rak'ah, and the imam came to a fifth?
Answer:
No, he does not follow him; he sits.
Q: I missed a rak'ah; for example, I prayed three and missed one, and the imam came to a fifth?
The Shaykh: Sit down, do not follow him. When he says the taslim, you stand up and make up the rak'ah you missed; do not follow him.
A man entered a four-rak'ah prayer and missed a rak'ah, and the imam came to a fifth?
Answer:
No, he does not follow him; he sits.
Q: I missed a rak'ah; for example, I prayed three and missed one, and the imam came to a fifth?
The Shaykh: Sit down, do not follow him. When he says the taslim, you stand up and make up the rak'ah you missed; do not follow him.
Source
binbaz.org.sa
The Arabic text is copied verbatim from the original source, without any edits.