Abdullah bin Umar reported,

Umar bin Khattab set out with the Messenger of Allah ﷺ in a group toward Ibn Sayyad, until they found him playing with some boys near the fortress of Banu Maghalah. Ibn Sayyad had nearly reached puberty at that time, and he did not notice them until the Messenger of Allah ﷺ struck his back with his hand.Then the Messenger of Allah ﷺ said to Ibn Sayyad, "Do you bear witness that I am the Messenger of Allah?"Ibn Sayyad looked at him and replied, "I bear witness that you are the messenger of the unlettered ones."Then Ibn Sayyad said to the Messenger of Allah ﷺ, "Do you bear witness that I am the messenger of Allah?"The Messenger of Allah ﷺ rejected this and said, "I believe in Allah and in His messengers."Then the Messenger of Allah ﷺ asked him, "What do you see?"Ibn Sayyad said, "A truthful one and a liar come to me."The Messenger of Allah ﷺ said to him, "The matter has been confused for you."Then the Messenger of Allah ﷺ said, "I have hidden something for you."Ibn Sayyad said, "It is the smoke."The Messenger of Allah ﷺ said to him, "Be off with you. You will never exceed your measure."Umar bin Khattab said, "Let me, Messenger of Allah, strike off his head."The Messenger of Allah ﷺ replied, "If he is the one, you will not be given power over him, and if he is not, there is no good for you in killing him."Salim bin Abdullah said, I heard Abdullah bin Umar say, Later, the Messenger of Allah ﷺ and Ubayy bin Kaab al-Ansari set out to the date palm grove where Ibn Sayyad was. When the Messenger of Allah ﷺ entered the grove, he began to take cover behind the trunks of the palm trees, hoping to hear something from Ibn Sayyad before Ibn Sayyad could see him. The Messenger of Allah ﷺ saw him lying on a bed wrapped in a velvet cloak, mumbling to himself.Ibn Sayyad's mother saw the Messenger of Allah ﷺ taking cover behind the palm trunks, and she called out to Ibn Sayyad, "Saf!" which was his name. "This is Muhammad!"Ibn Sayyad sprang up, and the Messenger of Allah ﷺ said, "If she had left him alone, things would have been made clear."Salim said, Abdullah bin Umar said, The Messenger of Allah ﷺ then stood among the people and praised Allah as He deserves to be praised. Then he mentioned the Dajjal and said, "I warn you of him. There has been no prophet who did not warn his people about him. Nuh warned his people of him. But I shall tell you something about him that no prophet has told his people. Know that he is one-eyed, and Allah is not one-eyed."

أن عبد الله بن عمر أخبره

أن عمر بن الخطاب انطلق مع رسول الله ﷺ في رهط قبل ابن صياد حتى وجده يلعب مع الصبيان عند أطم بني مغالة، وقد قارب ابن صياد يومئذ الحلم، فلم يشعر حتى ضرب رسول الله ﷺ ظهره بيده، ثم قال رسول الله ﷺ لابن صياد: أتشهد أني رسول الله؟ فنظر إليه ابن صياد، فقال: أشهد أنك رسول الأميين، فقال ابن صياد لرسول الله ﷺ: أتشهد أني رسول الله؟ فرفضه رسول الله ﷺ، وقال: آمنت بالله وبرسله، ثم قال له رسول الله ﷺ: ماذا تري؟ قال ابن صياد: يأتيني صادق وكاذب، فقال له رسول الله ﷺ: خلط عليك الأمر، ثم قال له رسول الله ﷺ: إني قد خبأت لك خبيئا، فقال ابن صياد: هو الدخ، فقال له رسول الله ﷺ: اخسأ، فلن تعدو قدرك، فقال عمر بن الخطاب: ذرني يا رسول الله أضرب عنقه، فقال له رسول الله ﷺ إن يكنه فلن تسلط عليه، وإن لم يكنه فلا خير لك في قتله. وقال سالم بن عبد الله: سمعت عبد الله بن عمر يقول: انطلق بعد ذلك رسول الله ﷺ، وأبي بن كعب الأنصاري إلى النخل التي فيها ابن صياد حتى إذا دخل رسول الله ﷺ النخل، طفق يتقي بجذوع النخل، وهو يختل أن يسمع من ابن صياد شيئا قبل أن يراه ابن صياد، فرآه رسول الله ﷺ وهو مضطجع على فراش في قطيفة له فيها زمزمة، فرأت أم ابن صياد رسول الله ﷺ وهو يتقي بجذوع النخل، فقالت لابن صياد: يا صاف! وهو اسم ابن صياد هذا محمد، فثار ابن صياد، فقال رسول الله ﷺ: لو تركته بين. قال سالم: قال عبد الله بن عمر: فقام رسول الله ﷺ في الناس، فأثنى على الله بما هو أهله، ثم ذكر الدجال، فقال: إني لأنذركموه، ما من نبي إلا وقد أنذره قومه، لقد أنذره نوح قومه، ولكن أقول لكم فيه قولا لم يقله نبي لقومه، تعلموا أنه أعور، وأن الله تبارك وتعالى ليس بأعور.