Volume 2, Book 21, Number 274:
Narrated Abu Huraira:
My friend (the Prophet) advised me to do three things and I shall not leave them till I die, these
are: To fast three days every month, to offer the Duha prayer, and to offer Witr before sleeping.
Volume 2, Book 21, Number 275t:
Narrated Anas bin Sirin:
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 and invited
him to his house. He washed one side of a mat with water and the Prophet offered two Rakat on it.”
So and so, the son of so and so, the son of Al-Jarud asked Anas, “Did the Prophet use to offer the
Duha prayer?” Anas replied, “I never saw him praying (the Duha prayer) except on that day.”