Chapter 12: Life of the Dajjal
The Dajjal will be created in order to provide a test for the people who will be in the Dunya towards the end of time.
Many people will be led astray by him and many will be guided through him. However, only the sinful people will be led astray.
Abu Bakrah reported that the Prophet Muhammad ﷺ said: The Dajjal’s parents will remain childless for thirty years, then a one-eyed child will be born to them. He will cause them a great deal of trouble. When he sleeps, his eyes will be closed but his heart (or mind) will still be active.
This means that the evil plots that he has will still come to his mind even as he sleeps.
The Prophet Muhammad ﷺ then described the Dajjal’s parents by saying: His father will be a tall and bulky man with a long nose like a beak, and his mother will be a huge, heavy breasted woman.
Abu Bakrah reported a story in which he said: We heard that a child had been born to some of the Jews in Madinah. Al-Zubayr ibn Al-Awwam and I went to see his parents and found that they matched the exact description that was given by Prophet. We saw the boy lying in the sun, covered with a blanket, murmuring to himself. We asked the parents about him and they replied: We remained childless for thirty years then this one-eyed boy was born to us. He causes a great deal of trouble. When we went out, we passed the boy. The boy asked: What were you doing? We replied: Did you hear us? He said: Yes, when I sleep my eyes are closed but my heart (mind) is still active.
This Jewish boy was Ibn Sayyad. (Tirmidhi, Ahmad)
However, it has been reported that this specific chain of narration does not seem to be strong in authenticity and only Allah SWT knows best.