(a) It is narrated from Yahya bin Sa'id and Rabi'ah (may Allah have mercy on them both) that al-Furafisah bin Umayr (may Allah have mercy on him) said, and then he mentioned the complete hadith.
(b) This hadith is evidence that he used to begin the prayer in the darkness.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 2149