Narrated Abu Hurairah:
A man was praying with his lower garment hanging down. The Messenger of Allah ﷺ said to him: Go and perform ablution. He then went and performed ablution. He then came and he said: Go and perform ablution. Then a man said to him: Messenger of Allah, what is the matter with you that you commanded him to perform ablution and then you kept silence ? He replied: He was praying while hanging down his lower garments, and Allah does not accept the prayer of a man who hangs down his lower garment.

حَدَّثَنَا مُوسَى بْنُ إِسْمَاعِيلَ، حَدَّثَنَا أَبَانُ، حَدَّثَنَا يَحْيَى، عَنْ أَبِي جَعْفَرٍ، عَنْ عَطَاءِ بْنِ يَسَارٍ، عَنْ أَبِي هُرَيْرَةَ، قَالَ بَيْنَمَا رَجُلٌ يُصَلِّي مُسْبِلاً إِزَارَهُ فَقَالَ لَهُ رَسُولُ اللَّهِ ﷺ " اذْهَبْ فَتَوَضَّأْ " . فَذَهَبَ فَتَوَضَّأَ ثُمَّ جَاءَ ثُمَّ قَالَ " اذْهَبْ فَتَوَضَّأْ " . فَقَالَ لَهُ رَجُلٌ يَا رَسُولَ اللَّهِ مَا لَكَ أَمَرْتَهُ أَنْ يَتَوَضَّأَ ثُمَّ سَكَتَّ عَنْهُ قَالَ " إِنَّهُ كَانَ يُصَلِّي وَهُوَ مُسْبِلٌ إِزَارَهُ وَإِنَّ اللَّهَ لاَ يَقْبَلُ صَلاَةَ رَجُلٍ مُسْبِلٍ " .