Anas b. Malik reported:

A man from the Ansar said: I am a corpulent man-and he was (actually) a fat man; I cannot pray along with you. He prepared food for him and invited him to his house. (he said) (please) pray (here) so that I may see how you pray, and then I would follow you. They (the people) washed one side of their mat. He (the prophet) then got up and prayed two Rak’ahs. Ibn al-Jarud asked Anas b. Malik: would he (the prophet) say the forenoon prayer? He replied: I did not see him offering this prayer except that day.

حَدَّثَنَا عُبَيْدُ اللَّهِ بْنُ مُعَاذٍ، حَدَّثَنَا أَبِي، حَدَّثَنَا شُعْبَةُ، عَنْ أَنَسِ بْنِ سِيرِينَ، عَنْ أَنَسِ بْنِ مَالِكٍ، قَالَ قَالَ رَجُلٌ مِنَ الأَنْصَارِ يَا رَسُولَ اللَّهِ إِنِّي رَجُلٌ ضَخْمٌ - وَكَانَ ضَخْمًا - لاَ أَسْتَطِيعُ أَنْ أُصَلِّيَ مَعَكَ - وَصَنَعَ لَهُ طَعَامًا وَدَعَاهُ إِلَى بَيْتِهِ - فَصَلِّ حَتَّى أَرَاكَ كَيْفَ تُصَلِّي فَأَقْتَدِيَ بِكَ ‏.‏ فَنَضَحُوا لَهُ طَرَفَ حَصِيرٍ كَانَ لَهُمْ فَقَامَ فَصَلَّى رَكْعَتَيْنِ ‏.‏ قَالَ فُلاَنُ بْنُ الْجَارُودِ لأَنَسِ بْنِ مَالِكٍ أَكَانَ يُصَلِّي الضُّحَى قَالَ لَمْ أَرَهُ صَلَّى إِلاَّ يَوْمَئِذٍ ‏.‏