The prostration for forgetfulness for the late-joining follower
Machine translationRead the Arabic original
Question:
And last night, the Shaykh asked: If a person joins the prayer with the imam and has already completed the prayer that the imam is currently performing, and the worker in the hands of the two Shaykhs who preceded him, is this method valid with the imam, or does he perform what remains of his prayer?
Answer:
He follows the imam and prostrates with him. When the imam concludes the prayer, the follower stands and performs what he missed. He follows the imam and prostrates with him for the prostration for forgetfulness, even if he is a late-joining follower, and even if he did not witness the forgetfulness. He is required to follow the imam based on the saying of the Messenger of Allah (peace and blessings be upon him) Yes. If he stands, he continues and prostrates when he intends to conclude the prayer.
And last night, the Shaykh asked: If a person joins the prayer with the imam and has already completed the prayer that the imam is currently performing, and the worker in the hands of the two Shaykhs who preceded him, is this method valid with the imam, or does he perform what remains of his prayer?
Answer:
He follows the imam and prostrates with him. When the imam concludes the prayer, the follower stands and performs what he missed. He follows the imam and prostrates with him for the prostration for forgetfulness, even if he is a late-joining follower, and even if he did not witness the forgetfulness. He is required to follow the imam based on the saying of the Messenger of Allah (peace and blessings be upon him)
And if the imam forgets, it is upon him and upon them.
وإذا سهى الإمام فعليه وعليهم.
Source
شرح بلوغ المرام من أدلة الأحكام [ صالح الفوزان ]، باب سجود السهو وغيره — islamhouse.com (1:03:22)
The Arabic text is a machine transcription of the audio recording.