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.": (IT)
English reference (IT): Book 1, Hadith 10 (IT)
Arabic reference (IT): Book 1, Hadith 11 (IT)