It is narrated from Hazrat Anas (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: When my Lord, the Lord of the worlds, called me on the night of Ascension (Mi'raj), I passed by a group of people whose fingernails were made of copper and they were scratching their faces and chests with them. I asked, "O Jibreel! Who are these people?" He replied, "These are the ones who used to eat the flesh of others (backbite) and point fingers at people."