Abu Huraira said that while a man was praying letting his lower garment trail, Allah's Messenger ﷺ said to him, “Go and perform ablution.” After he had gone to perform ablution and returned a man asked Allah's Messenger ﷺ why he had ordered him to perform ablution, and he said “He was praying with his lower garment trailing, and Allah does not accept the prayer of a man who lets his lower garment trail.” Abu Dawud transmitted it.