Messenger of Allah ﷺ and Ubai bin Kaʿb Al-Ansari went to the garden where Ibn Saiyad used to live. When Messenger of Allah ﷺ entered (the garden), he (i.e. Messenger of Allah ﷺ ) started hiding himself behind the date108 palms as he wanted to hear secretly the talk of Ibn Saiyad before the latter saw him. Ibn Saiyad wrapped with a soft decorated sheet was lying on his bed murmuring. Ibn Saiyad's mother saw the Prophet hiding behind the stems of the date-palms. She addressed Ibn Saiyad saying, "O Saf, this is Muhammad." Hearing that Ibn Saiyad stopped murmuring (or got cautious), the Prophet ﷺ said, "If she had left him undisturbed, he would have revealed his reality." (See Hadith No. 290, Vol 4 for details)  

سَمِعْتُ عَبْدَ اللَّهِ بْنَ عُمَرَ ؓ يَقُولُ انْطَلَقَ رَسُولُ اللَّهِ ﷺ وَأُبَىُّ بْنُ كَعْبٍ الأَنْصَارِيُّ يَؤُمَّانِ النَّخْلَ الَّتِي فِيهَا ابْنُ صَيَّادٍ حَتَّى إِذَا دَخَلَ رَسُولُ اللَّهِ ﷺ طَفِقَ رَسُولُ اللَّهِ ﷺ يَتَّقِي بِجُذُوعِ النَّخْلِ وَهْوَ يَخْتِلُ أَنْ يَسْمَعَ مِنِ ابْنِ صَيَّادٍ شَيْئًا قَبْلَ أَنْ يَرَاهُ وَابْنُ صَيَّادٍ مُضْطَجِعٌ عَلَى فِرَاشِهِ فِي قَطِيفَةٍ لَهُ فِيهَا رَمْرَمَةٌ أَوْ زَمْزَمَةٌ فَرَأَتْ أُمُّ ابْنِ صَيَّادٍ النَّبِيَّ ﷺ وَهْوَ يَتَّقِي بِجُذُوعِ النَّخْلِ فَقَالَتْ لاِبْنِ صَيَّادِ أَىْ صَافِ هَذَا مُحَمَّدٌ فَتَنَاهَى ابْنُ صَيَّادٍ قَالَ رَسُولُ اللَّهِ ﷺ لَوْ تَرَكَتْهُ بَيَّنَ  

Once, Messenger of Allah ﷺ accompanied by Ubai bin Ka'b set out to Ibn Saiyyad. He was informed that Ibn Saiyyad was in a garden of date palms. When Messenger of Allah ﷺ entered the garden of date-palms, he started hiding himself behind the trunks of the palms while Ibn Saiyyad was covered with a velvet sheet with murmurs emanating from under it. Ibn Saiyyah's mother saw Messenger of Allah ﷺ and said, "O Saf! This is Muhammad." So Ibn Saiyyad got up. Messenger of Allah ﷺ said, "If she had left him (in his state), the truth would have been clear."  

أَنَّهُ قَالَ انْطَلَقَ رَسُولُ اللَّهِ ﷺ وَمَعَهُ أُبَىُّ بْنُ كَعْبٍ قِبَلَ ابْنِ صَيَّادٍ فَحُدِّثَ بِهِ فِي نَخْلٍ فَلَمَّا دَخَلَ عَلَيْهِ رَسُولُ اللَّهِ ﷺ النَّخْلَ طَفِقَ يَتَّقِي بِجُذُوعِ النَّخْلِ وَابْنُ صَيَّادٍ فِي قَطِيفَةٍ لَهُ فِيهَا رَمْرَمَةٌ فَرَأَتْ أُمُّ ابْنِ صَيَّادٍ رَسُولَ اللَّهِ ﷺ فَقَالَتْ يَا صَافِ هَذَا مُحَمَّدٌ فَوَثَبَ ابْنُ صَيَّادٍ فَقَالَ رَسُولُ اللَّهِ ﷺ لَوْ تَرَكَتْهُ بَيَّنَ  

(Later on) Messenger of Allah ﷺ (once again) went along with Ubai bin Ka'b to the garden of date-palms where Ibn Saiyad was staying. When the Prophet entered the garden, he started hiding himself behind the trunks of the date-palms as he wanted to hear something from the Ibn Saiyad before the latter could see him. Ibn Saiyad was lying in his bed, covered with a velvet sheet from where his murmurs were heard. Ibn Saiyad's mother saw the Prophet ﷺ while he was hiding himself behind the trunks of the date-palms. She addressed Ibn Saiyad, "O Saf!" (And this was his name). Ibn Saiyad got up. The Prophet ﷺ said, "Had this woman let him to himself, he would have revealed the reality of his case." Then the Prophet ﷺ got up amongst the people, glorifying Allah as He deserves, he mentioned Ad-Dajjal, saying, "I warn you about him (i.e. Ad-Dajjal) and there is no prophet who did not warn his nation about him, and Noah warned his nation about him, but I tell you a statement which no prophet informed his nation of. You should understand that he is a one-eyed man and Allah is not one-eyed."  

انْطَلَقَ النَّبِيُّ ﷺ وَأُبَىُّ بْنُ كَعْبٍ يَأْتِيَانِ النَّخْلَ الَّذِي فِيهِ ابْنُ صَيَّادٍ حَتَّى إِذَا دَخَلَ النَّخْلَ طَفِقَ النَّبِيُّ ﷺ يَتَّقِي بِجُذُوعِ النَّخْلِ وَهْوَ يَخْتِلُ ابْنَ صَيَّادٍ أَنْ يَسْمَعَ مِنِ ابْنِ صَيَّادٍ شَيْئًا قَبْلَ أَنْ يَرَاهُ وَابْنُ صَيَّادٍ مُضْطَجِعٌ عَلَى فِرَاشِهِ فِي قَطِيفَةٍ لَهُ فِيهَا رَمْزَةٌ فَرَأَتْ أُمُّ ابْنِ صَيَّادٍ النَّبِيَّ ﷺ وَهْوَ يَتَّقِي بِجُذُوعِ النَّخْلِ فَقَالَتْ لاِبْنِ صَيَّادٍ أَىْ صَافِ وَهْوَ اسْمُهُ فَثَارَ ابْنُ صَيَّادٍ فَقَالَ النَّبِيُّ ﷺ لَوْ تَرَكَتْهُ بَيَّنَ وَقَالَ سَالِمٌ قَالَ ابْنُ عُمَرَ ثُمَّ قَامَ النَّبِيُّ ﷺ فِي النَّاسِ فَأَثْنَى عَلَى اللَّهِ بِمَا هُوَ أَهْلُهُ ثُمَّ ذَكَرَ الدَّجَّالَ فَقَالَ إِنِّي أُنْذِرُكُمُوهُ وَمَا مِنْ نَبِيٍّ إِلاَّ قَدْ أَنْذَرَهُ قَوْمَهُ لَقَدْ أَنْذَرَهُ نُوحٌ قَوْمَهُ وَلَكِنْ سَأَقُولُ لَكُمْ فِيهِ قَوْلاً لَمْ يَقُلْهُ نَبِيٌّ لِقَوْمِهِ تَعْلَمُونَ أَنَّهُ أَعْوَرُ وَأَنَّ اللَّهَ لَيْسَ بِأَعْوَرَ  

[Machine] "And I heard Ibn Umar saying that after that, the Messenger of Allah ﷺ went with Ubayy ibn Ka'b to the date palm tree that belonged to Ibn Sayyad. When the Messenger of Allah ﷺ entered the date palm tree, he shook the trunks of the date palm tree and he loved to hear something from Ibn Sayyad before Ibn Sayyad could see him. But the Messenger of Allah ﷺ saw him lying, on a bed in a Qatifah that had a groaning noise coming from it. The mother of Ibn Sayyad saw the Messenger of Allah ﷺ shaking the trunks of the date palm tree and she said to Ibn Sayyad, and the Messenger of Allah ﷺ said, 'If you leave him.' Ibn Umar said that the Messenger of Allah ﷺ then ascended the pulpit and praised Allah as He deserves to be praised, and then he mentioned the Dajjal and said, 'I warn you about him. There was no Prophet who did not warn his people about him. Indeed, Noah warned his people about him. But I will tell you something about him that no Prophet told his people: learn that he is one-eyed and that Allah is not one-eyed.'"  

وَسَمِعْتُ ابْنَ عُمَرَ يَقُولُ انْطَلَقَ بَعْدَ ذَلِكَ رَسُولُ اللَّهِ ﷺ وَأُبَيُّ بْنُ كَعْبٍ إِلَى النَّخْلِ الَّتِي فِيهَا ابْنُ صَيَّادٍ حَتَّى إِذَا دَخَلَ رَسُولُ اللَّهِ النَّخْلَ طَفِقَ يَتَّقِي بِجُذُوعِ النَّخْلِ وَهُوَ يُحِبُّ أَنْ يَسْمَعَ مِنِ ابْنِ صَيَّادٍ شَيْئًا قَبْلَ أَنْ يَرَاهُ ابْنُ صَيَّادٍ فَرَآهُ رَسُولُ اللَّهِ وَهُوَ مُضْطَجِعٌ عَلَى فِرَاشٍ فِي قَطِيفَةٍ لَهُ فِيهَا زَمْزَمَةٌ فَرَأَتْ أُمُّ ابْنِ صَيَّادٍ رَسُولَ اللَّهِ وَهُوَ يَتَّقِي بِجُذُوعِ النَّخْلِ فَقَالَتْ لِابْنِ صَيَّادٍ فَقَالَ رَسُولُ اللَّهِ «لَوْ تَرَكْتِيهِ» قَالَ ابْنُ عُمَرَ فَقَامَ رَسُولُ اللَّهِ فِي النَّاسِ فَأَثْنَى عَلَى اللَّهِ بِمَا هُوَ أَهْلُهُ ثُمَّ ذَكَرَ الدَّجَّالَ فَقَالَ «إِنِّي أُنْذِرُكُمُوهُ مَا مِنْ نَبِيٍّ إِلَّا قَدْ أَنْذَرَ قَوْمَهُ لَقَدْ أَنْذَرَ نُوحٌ قَوْمَهُ وَلَكِنِّي أَقُولُ لَكُمْ فِيهِ قَوْلًا لَمْ يَقُلْهُ نَبِيٌّ لِقَوْمِهِ تَعَلَّمُوا أَنَّهُ أَعْوَرُ وَأَنَّ اللَّهَ لَيْسَ بِأَعْوَرَ»