Yahya related to me from Malik from Abu'n-Nadr, the mawla of Umaribn Ubaydullah from Yusr ibn Said that Zayd ibn Thabit said, "The mostexcellent prayer is your prayer in your house, except for theprescribed prayers." (FR)
App reference (FR): Book 8, Hadith 4 (FR)
USC-MSA web (English) reference: Book 8, Hadith 4 (FR)
Arabic reference (FR): Book 8, Hadith 291 (FR)