It is narrated from Sayyiduna Abu Bakrah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: There will be no child born to the parents of Dajjal for thirty years; after that, a one-eyed child will be born to them. He will be a child who brings more harm and less benefit. When he sleeps, his eyes will sleep but his heart will remain awake.