It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "Do not disfigure the face, for the son of Adam was created upon the image of the Most Merciful, the Exalted."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 13523