A man joined the prayer late, missing one rak'ah, and the imam made a mistake and prayed five rak'ahs instead of four. What is the ruling on the prayer of the latecomer: is it complete or not?

The questioner : Yes, well, here is a simple question: If a person joins the prayer late, let us say he missed one rak'ah, and the fifth rak'ah was performed due to a mistake, does that mean his prayer is considered complete?

The Shaykh : He joined late, missing how many rak'ahs?

The questioner : The first rak'ah had ended, and he joined them in the second rak'ah!

The Shaykh : Yes.

The questioner : And the imam brought in the fifth rak'ah.

The Shaykh : That is enough, that is enough. I am asking you: in which rak'ah did he join? In the second!

The questioner: Yes.

The Shaykh : So, did he miss the first one or not?

The questioner: Yes.

The Shaykh : Yes, he must make it up!

The questioner : He must perform the first one.

The Shaykh: Yes.

The questioner : May Allah reward you.

The Shaykh : And may He reward you.