Narated By Abu Masud : The Prophet (peace be upon him) said, "The sun and the moon do not eclipse because of the death of someone from the people but they are two signs amongst the signs of Allah. When you see them stand up and pray."
Narated By 'Abdullah bin 'Amr : Once the Prophet (peace be upon him) remained behind us in a journey. He joined us while we were performing ablution for the prayer which was over-due. We were just passing wet hands over our feet (and not washing them properly) so the Prophet addressed us in a loud voice and said twice or thrice: "Save your heels from the fire."
Qatadah R.A. reports: "I asked Anas R.A., 'Did Rasulullah (Sallallahu alaihe wasallam) dye his hair?'" He replied: "The hair of Rasulullah (Sallallahu alaihe wasallam) did not reach such a stage where one would use a dye; however Rasulullah (Sallallahu alihe wasallam) did have a few white hair on his temples, on the other hand Abu Bakr R.A. dyed his hair with Hina and Katm."