Characteristics of Prayer
Bukhari :: Book 1 :: Volume 12 :: Hadith 819
Narrated Anas bin Malik:
My grandmother Mulaika invited Allah's Apostle for a meal which she had prepared specially for him. He ate some of it and said, "Get up. I shall lead you in the prayer." I brought a mat that had become black owing to excessive use and I sprinkled water on it. Allah's Apostle stood on it and prayed two Rakat; and the orphan was with me (in the first row), and the old lady stood behind us.
Source materials are from the University of Southern California MSA site
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