Abu-Ishaaq (Radiallahu anhu) says:
"A person once asked Baraa bin Aazib (Radiallahu anhu), "Was the face of Rasulullah (Sallallahu alaihe wasallam) shining like a sword?" He replied: "No but like a full-moon with its roundness.": (JA)
English reference (JA): Book 1, Hadith 10 (JA)
Arabic reference (JA): Book 1, Hadith 11 (JA)