It is narrated from Sayyiduna Abu Umamah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "You will surely straighten your rows, or else your faces will be disfigured, and your sight will surely be blotted out, or your sight will surely be snatched away."
Hadith Referenceالمعجم الكبير للطبراني / باب الصاد / 7828