To offer As-Salat (the prayers) on the Hasir (a mat that is made of the leaves of date-palm trees and is as long as or longer than a man's stature)

Sahih al-Bukhari · Book 8 · Hadith 380

حَدَّثَنَا عَبْدُ اللَّهِ، قَالَ أَخْبَرَنَا 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 لَهُ، فَأَكَلَ مِنْهُ ثُمَّ قَالَ ‏"‏ قُومُوا فَلأُصَلِّ لَكُمْ ‏"‏‏.‏ قَالَ أَنَسٌ فَقُمْتُ إِلَى حَصِيرٍ لَنَا قَدِ اسْوَدَّ مِنْ ط…

Narrated 'Is-haq: Anas bin Malik said, "My grandmother Mulaika invited Allah's Messenger (ﷺ) for a meal which she herself had prepared. He ate from it and said, 'Get up! I will lead you in the prayer.' " Anas added, "I…