Volume 1, Book 11, Number 639:
Narrated Anas bin Sirin:
I heard Anas saying, “A man from Ansar said to the Prophet, ‘I cannot pray with you (in congrega –
tion).’ He was a very fat man and he prepared a meal for the Prophet and invited him to his house.
He spread out a mat for the Prophet, and washed one of its sides with water, and the Prophet prayed
two Rakat on it.” A man from the family of Al-Jaruid asked, “Did the Prophet used to pray the Duha
(forenoon) prayer?” Anas said, “I did not see him praying the Duha prayer except on that day.”