24 35 Allah is the Light of the heavens and the earth. The parable of His Light is as if there were a Niche and within it a lamp: the Lamp enclosed in Glass: the glass as it were a brilliant star: lit from a blessed Tree an Olive neither of the East nor of the West whose Oil is well-nigh luminous though fire scarce touched it: Light upon Light! Allah doth guide whom He will to His Light. Allah doth set forth Parables for men: and Allah doth know all things.
He who defends the honor of another Muslim will have Allah remove the fire from his face on the day of resurrection. (Tirmizi)