1828 — Muhammad ibn ʿAbd Allah ibn Nuʿaym, by written authorization, related to us; he said: Muhammad ibn Ṣāliḥ ibn Hāniʾ narrated to us; he said: Abū Saʿīd Muhammad ibn Shādhān narrated to us; he said: I heard Muhammad ibn Aslam say, “I heard Yazīd ibn Hārūn state: ‘Whoever serves as an active propagandist for irjāʾ (postponing judgment regarding faith and deeds), the prayer performed behind him must be repeated.’”