The obligatory prayer behind the one praying a voluntary prayer, and the intention of leading
Machine translationRead the Arabic original
The questioner:
And the difference in the prayer of the one praying the obligatory prayer is the first letter, is it not obligatory that the imam has intended to lead and prays with him the second prayer, is it not permissible that he prays before them while they are praying?
The Shaykh:
Yes, they pray a complete prayer, and it is a voluntary prayer for him and a deficiency for him, and even if it were complete, it would be a voluntary prayer for him.
And the difference in the prayer of the one praying the obligatory prayer is the first letter, is it not obligatory that the imam has intended to lead and prays with him the second prayer, is it not permissible that he prays before them while they are praying?
The Shaykh:
Yes, they pray a complete prayer, and it is a voluntary prayer for him and a deficiency for him, and even if it were complete, it would be a voluntary prayer for him.
Source
شرح بلوغ المرام من أدلة الأحكام [ صالح الفوزان ]، تابع باب صلاة الجماعة والإمامة - 1 — islamhouse.com (56:49)
The Arabic text is a machine transcription of the audio recording.