While the Messenger of Allah ﷺ was leading his Companions in prayer, he took off his sandals and laid them on his left side; so when the people saw this, they removed their sandals. When the Messenger of Allah ﷺ finished his prayer, he asked: What made you remove your sandals? The replied: We saw you remove your sandals, so we removed our sandals. The Messenger of Allah ﷺ then said: Gabriel came to me and informed me that there was filth in them. When any of you comes to the mosque, he should see; if he finds filth on his sandals, he should wipe it off and pray in them.  

بَيْنَمَا رَسُولُ اللَّهِ ﷺ يُصَلِّي بِأَصْحَابِهِ إِذْ خَلَعَ نَعْلَيْهِ فَوَضَعَهُمَا عَنْ يَسَارِهِ فَلَمَّا رَأَى ذَلِكَ الْقَوْمُ أَلْقَوْا نِعَالَهُمْ فَلَمَّا قَضَى رَسُولُ اللَّهِ ﷺ صَلاَتَهُ قَالَ مَا حَمَلَكُمْ عَلَى إِلْقَائِكُمْ نِعَالَكُمْ قَالُوا رَأَيْنَاكَ أَلْقَيْتَ نَعْلَيْكَ فَأَلْقَيْنَا نِعَالَنَا فَقَالَ رَسُولُ اللَّهِ ﷺ إِنَّ جِبْرِيلَ ﷺ أَتَانِي فَأَخْبَرَنِي أَنَّ فِيهِمَا قَذَرًا وَقَالَ إِذَا جَاءَ أَحَدُكُمْ إِلَى الْمَسْجِدِ فَلْيَنْظُرْ فَإِنْ رَأَى فِي نَعْلَيْهِ قَذَرًا أَوْ أَذًى فَلْيَمْسَحْهُ وَلْيُصَلِّ فِيهِمَا  

[Machine] The Messenger of Allah ﷺ prayed with us one day, and during some of his prayers, he took off his shoes and placed them to his left. When the people saw that, they also took off their shoes. After he finished his prayer, he asked, "What happened? Why did you all take off your shoes?" They replied, "We saw you take off your shoes, so we took off ours." The Messenger of Allah ﷺ said, "Indeed, Gabriel came to me and informed me that there was impurity or harm in them, so I took them off. So when any of you come to the mosque, let him look at his shoes, and if he sees impurity or harm in them, let him wipe them and pray in them." My father did not mention the details of what was in the shoes in this narration.  

صَلَّى بِنَا رَسُولُ اللهِ ﷺ ذَاتَ يَوْمٍ فَلَمَّا كَانَ فِي بَعْضِ صَلَاتِهِ خَلَعَ نَعْلَيْهِ فَوَضَعَهُمَا عَنْ يَسَارِهِ فَلَمَّا رَأَى النَّاسُ ذَلِكَ خَلَعُوا نِعَالَهُمْ فَلَمَّا قَضَى صَلَاتَهُ قَالَ مَا بَالُكُمْ أَلْقَيْتُمْ نِعَالَكُمْ؟ قَالُوا رَأَيْنَاكَ أَلْقَيْتَ نَعْلَيْكَ فَأَلْقَيْنَا نِعَالَنَا فَقَالَ رَسُولُ اللهِ ﷺ إِنَّ جِبْرِيلَ أَتَانِي فَأَخْبَرَنِي أَنَّ فِيهِمَا قَذَرًا أَوْ قَالَ أَذًى فَأَلْقَيْتُهُمَا فَإِذَا جَاءَ أَحَدُكُمْ إِلَى الْمَسْجِدِ فَلْيَنْظُرْ فِي نَعْلَيْهِ فَإِنْ رَأَى فِيهِمَا قَذَرًا أَوْ قَالَ أَذًى فَلْيَمْسَحْهُمَا وَلْيُصَلِّ فِيهِمَا قَالَ أَبِي لَمْ يَجِئْ فِي هَذَا الْحَدِيثِ بَيَانُ مَا كَانَ فِي النَّعْلِ  

[Machine] While the Prophet Muhammad ﷺ was praying with his companions, he took off his sandals and placed them on his left side. So, they also took off their sandals. When he finished his prayer, he asked them, "What made you take off your sandals?" They replied, "We saw you taking off yours, so we took off ours too." He said, "Verily, Gabriel came to me or someone else came and informed me that there was something harmful or impure on them. So, when any of you come to the mosque, let him flip his sandals. If he sees something harmful, he should shake them off and pray in them."  

بَيْنَمَا كان رَسُولُ اللَّهِ ﷺ يُصَلِّي بِأَصْحَابِهِ إِذْ خَلَعَ نَعْلَيْهِ فَوَضَعَهُمَا عَنْ يَسَارِهِ فَخَلَعُوا نِعَالَهُمْ فَلَمَّا قَضَى صَلَاتَهُ قَالَ «مَا حَمَلَكُمْ عَلَى إِلْقَائِكُمْ نِعَالَكُمْ؟» قَالُوا رَأَيْنَاكَ خَلَعْتَ فَخَلَعْنَا قَالَ «إِنَّ جِبْرِيلَ أَتَانِي أَوْ أَتَى فَأَخْبَرَنِي أَنَّ فِيهِمَا أَذًى أَوْ قَذَرًا فَإِذَا جَاءَ أَحَدُكُمُ الْمَسْجِدَ فَلْيُقَلِّبْ نَعْلَيْهِ فَإِنْ رَأَى فِيهِمَا أَذًى فَلْيُمِطْ وَلْيُصَلِّ فِيهِمَا»