Narrated Anas bin Malik: Allah's Apostle visited a household among the Ansars, and he took a meal with them. When he intended to leave, he asked for a place in that house for him, to pray so a mat sprinkled with water was put and he offered prayer over it, and invoked for Allah's Blessing upon them (his hosts).

Narrated Anas bin Seereen: I heard Anas saying, "A man from Ansar said to the Prophet, 'I cannot pray with you (in congregation).' 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 rak`at 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."