The Prophet’s ﷺ advice to Abu Hurayrah

My friend (the Prophet ﷺ) advised me to do three things and I shall not leave them till I die: (1) to fast three days every month, (2) to offer the Duha prayer, and (3) to offer Witr before sleeping.  

أَوْصَانِي خَلِيلِي بِثَلاَثٍ لاَ أَدَعُهُنَّ حَتَّى أَمُوتَ: (١) صَوْمِ ثَلاَثَةِ أَيَّامٍ مِنْ كُلِّ شَهْرٍ، (٢) وَصَلاَةِ الضُّحَى، (٣) وَنَوْمٍ عَلَى وِتْرٍ.  

I heard Anas bin Malik al-Ansari saying, "An Ansari man, who was very fat, said to the Prophet, 'I am unable to present myself for the prayer with you.' He prepared a meal for the Prophet ﷺ and invited him to his house. He washed one side of a mat with water and the Prophet ﷺ offered two Rakat on it." So and so, the son of so and so, the son of Al-Jarud asked Anas, "Did the Prophet ﷺ use to offer the Duha prayer?" Anas replied, "I never saw him praying (the Duha prayer) except on that day."  

رَجُلٌ مِنَ الأَنْصَارِ وَكَانَ ضَخْمًا لِلنَّبِيِّ ﷺ إِنِّي لاَ أَسْتَطِيعُ الصَّلاَةَ مَعَكَ فَصَنَعَ لِلنَّبِيِّ ﷺ طَعَامًا فَدَعَاهُ إِلَى بَيْتِهِ وَنَضَحَ لَهُ طَرَفَ حَصِيرٍ بِمَاءٍ فَصَلَّى عَلَيْهِ رَكْعَتَيْنِ وَقَالَ فُلاَنُ بْنُ فُلاَنِ بْنِ جَارُودٍ لأَنَسٍ ؓ أَكَانَ النَّبِيُّ ﷺ يُصَلِّي الضُّحَى فَقَالَ مَا رَأَيْتُهُ صَلَّى غَيْرَ ذَلِكَ الْيَوْمِ