"One of my paternal uncles made some food for the Prophet and said to the Prophet: 'I would like you to eat and perform prayer in my house.' So he went to him, and in his house there was one of these Fahl. He ordered that a corner be swept and water sprinkled in it, then he performed prayer and we prayed with him.'" (Sahih)Abu 'Abdullah bin Majah said: A Fahl is a mat that has become black (through use).  

صَنَعَ بَعْضُ عُمُومَتِي لِلنَّبِيِّ ﷺ طَعَامًا فَقَالَ لِلنَّبِيِّ ﷺ إِنِّي أُحِبُّ أَنْ تَأْكُلَ فِي بَيْتِي وَتُصَلِّيَ فِيهِ قَالَ فَأَتَاهُ وَفِي الْبَيْتِ فَحْلٌ مِنْ هَذِهِ الْفُحُولِ فَأَمَرَ بِنَاحِيَةٍ مِنْهُ فَكُنِسَ وَرُشَّ فَصَلَّى وَصَلَّيْنَا مَعَهُ قَالَ أَبُو عَبْدِ اللَّهِ بْنُ مَاجَهْ الْفَحْلُ هُوَ الْحَصِيرُ الَّذِي قَدِ اسْوَدَّ  

[Machine] "To the Prophet ﷺ , I love for you to eat in my house and pray in it." He said, "So he came, and there was a prey of those birds in the house. So he ordered a corner of it to be swept and sprinkled, then he prayed and we prayed."  

لِلنَّبِيِّ ﷺ إِنِّي أُحِبُّ أَنْ تَأْكُلَ فِي بَيْتِي وَتُصَلِّيَ فِيهِ قَالَ فَأَتَى وَفِي الْبَيْتِ فَحْلٌ مِنْ تِلْكَ الْفُحُولِ قَالَ فَأَمَرَ بِنَاحِيَةٍ مِنْهُ فَكُنِسَ وَرُشَّ وَصَلَّى وَصَلَّيْنَا  

[Machine] "Some of my companions prepared food for the Messenger of Allah ﷺ and said, 'I would love for you to eat in my house and pray in it.'" So the Messenger of Allah ﷺ came, and there was a piece of chicken in the house, so he ordered a side of it to be cleaned, then he sprinkled it with water, and he prayed and we prayed with him.  

«صَنَعَ بَعْضُ عُمُومَتِي لِرَسُولِ اللَّهِ ﷺ طَعَامًا وَقَالَ إِنِّي أُحِبُّ أَنْ تَأْكُلَ فِي بَيْتِي وَتُصَلِّيَ فِيهِ فَأَتَاهُ رَسُولُ اللَّهِ ﷺ وَإِذَا فِي الْبَيْتِ فَحْلٌ مِنْ تِلْكَ الْفُحُولِ فَأَمَرَ بِجَانِبٍ مِنْهُ فَكُنِسَ ثُمَّ رُشَّ فَصَلَّى وَصَلَّيْنَا مَعَهُ»  

"صنع بعضُ عمومتى للنبي ﷺ طعاما فقال: إنى أحب أن تأكلَ في بيتى وتصلى فيه فأتاه وفى البيت فحل من تلك الفحول فأمر بجانب منه فكنس ورش فصلى وصلينا معه".