LessonsCongregational Prayer: Its Status, Priority in Leading, and Conduct of the ImamQuiz

وَيُكْرَهُ تَقْدِيمُ الْعَبْدِ، وَالْأَعْرَابِيِّ، وَالْفَاسِقِ، وَالْأَعْمَى، وَوَلَدِ الزِّنَا، فَإِنْ قَدَّمُوهُ جَازَ.
Meaning: It is disliked to put forward a slave, a desert-dweller, an openly sinful person, a blind person, or a person born outside marriage; if any of them leads, the prayer is valid.

The statement expressly separates disapproval of choosing certain candidates in its historical legal framework from validity of the prayer they lead.

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Disliked Selection Does Not Automatically Invalidate Prayer

Congregational Prayer: Its Status, Priority in Leading, and Conduct of the Imam

وَيُكْرَهُ تَقْدِيمُ الْعَبْدِ، وَالْأَعْرَابِيِّ، وَالْفَاسِقِ، وَالْأَعْمَى، وَوَلَدِ الزِّنَا، فَإِنْ قَدَّمُوهُ جَازَ.
Meaning: It is disliked to put forward a slave, a desert-dweller, an openly sinful person, a blind person, or a person born outside marriage; if any of them leads, the prayer is valid.

The statement expressly separates disapproval of choosing certain candidates in its historical legal framework from validity of the prayer they lead.