(Imām Bukhārī narrates): Isma'il narrated to us, he said: Malik narrated to me from Ishaq bin Abdullah bin Abi Talhah from Anas bin Malik, may Allāh be pleased with him, that
his grandmother Mulaikah invited the Prophet ﷺ to a meal that she had prepared for him. He ate from it, then he said: Get up, let me lead you in prayer. So I got up towards a mat which had become dirty from much use. I washed that mat with water. Then the Messenger of Allāh ﷺ stood up, and the orphan was with me, and the elderly woman was behind us. He led us in a prayer of two rak'ahs.
حَدَّثَنَا إِسْمَاعِيلُ، قَالَ حَدَّثَنِي مَالِكٌ، عَنْ إِسْحَاقَ بْنِ عَبْدِ اللَّهِ بْنِ أَبِي طَلْحَةَ، عَنْ أَنَسِ بْنِ مَالِكٍ، أَنَّ جَدَّتَهُ، مُلَيْكَةَ دَعَتْ رَسُولَ اللَّهِ صلى الله عليه وسلم لِطَعَامٍ صَنَعَتْهُ، فَأَكَلَ مِنْهُ فَقَالَ " قُومُوا فَلأُصَلِّيَ بِكُمْ ". فَقُمْتُ إِلَى حَصِيرٍ لَنَا قَدِ اسْوَدَّ مِنْ طُولِ مَا لُبِسَ، فَنَضَحْتُهُ بِمَاءٍ فَقَامَ رَسُولُ اللَّهِ صلى الله عليه وسلم وَالْيَتِيمُ مَعِي، وَالْعَجُوزُ مِنْ وَرَائِنَا، فَصَلَّى بِنَا رَكْعَتَيْنِ.
Reference: Sahih Al Bukhari 860