Narrated Ibn 'Umar:

'Umar set out along with the Prophet ﷺ with a group of people to Ibn Saiyad till they saw him playing with the boys near the hillocks of Bani Mughala. Ibn Saiyad at that time was nearing his puberty and did not notice (us) until the Prophet stroked him with his hand and said to him, "Do you testify that I am Allah's Apostle?" Ibn Saiyad looked at him and said, "I testify that you are the Messenger of illiterates." Then Ibn Saiyad asked the Prophet ﷺ, "Do you testify that I am Allah's Apostle?" The Prophet ﷺ refuted it and said, "I believe in Allah and His Apostles." Then he said (to Ibn Saiyad), "What do you think?" Ibn Saiyad answered, "True people and liars visit me." The Prophet ﷺ said, "You have been confused as to this matter." Then the Prophet ﷺ said to him, "I have kept something (in my mind) for you, (can you tell me that?)" Ibn Saiyad said, "It is Al-Dukh (the smoke)." (2) The Prophet ﷺ said, "Let you be in ignominy. You cannot cross your limits." On that 'Umar, said, "O Allah's Apostle! Allow me to chop his head off." The Prophet ﷺ said, "If he is he (i.e. Dajjal), then you cannot over-power him, and if he is not, then there is no use of murdering him." (Ibn 'Umar added): Later on Allah's Apostle ﷺ once again went along with Ubai bin Ka'b to the date-palm trees (garden) where Ibn Saiyad was staying. The Prophet ﷺ wanted to hear something from Ibn Saiyad before Ibn Saiyad could see him, and the Prophet ﷺ saw him lying covered with a sheet and from where his murmurs were heard. Ibn Saiyad's mother saw Allah's Apostle while he was hiding himself behind the trunks of the date-palm trees. She addressed Ibn Saiyad, "O Saf ! (and this was the name of Ibn Saiyad) Here is Muhammad." And with that Ibn Saiyad got up. The Prophet ﷺ said, "Had this woman left him (Had she not disturbed him), then Ibn Saiyad would have revealed the reality of his case.

حَدَّثَنَا عَبْدَانُ، أَخْبَرَنَا عَبْدُ اللَّهِ، عَنْ يُونُسَ، عَنِ الزُّهْرِيِّ، قَالَ أَخْبَرَنِي سَالِمُ بْنُ عَبْدِ اللَّهِ، أَنَّ ابْنَ عُمَرَ ـ رضى الله عنهما ـ أَخْبَرَهُ أَنَّ عُمَرَ انْطَلَقَ مَعَ النَّبِيِّ ﷺ فِي رَهْطٍ قِبَلَ ابْنِ صَيَّادٍ، حَتَّى وَجَدُوهُ يَلْعَبُ مَعَ الصِّبْيَانِ عِنْدَ أُطُمِ بَنِي مَغَالَةَ، وَقَدْ قَارَبَ ابْنُ صَيَّادٍ الْحُلُمَ فَلَمْ يَشْعُرْ حَتَّى ضَرَبَ النَّبِيُّ ﷺ بِيَدِهِ ثُمَّ قَالَ لاِبْنِ صَيَّادٍ " تَشْهَدُ أَنِّي رَسُولُ اللَّهِ ". فَنَظَرَ إِلَيْهِ ابْنُ صَيَّادٍ فَقَالَ أَشْهَدُ أَنَّكَ رَسُولُ الأُمِّيِّينَ. فَقَالَ ابْنُ صَيَّادٍ لِلنَّبِيِّ ﷺ أَتَشْهَدُ أَنِّي رَسُولُ اللَّهِ فَرَفَضَهُ وَقَالَ آمَنْتُ بِاللَّهِ وَبِرُسُلِهِ. فَقَالَ لَهُ " مَاذَا تَرَى ". قَالَ ابْنُ صَيَّادٍ يَأْتِينِي صَادِقٌ وَكَاذِبٌ. فَقَالَ النَّبِيُّ ﷺ " خُلِّطَ عَلَيْكَ الأَمْرُ " ثُمَّ قَالَ لَهُ النَّبِيُّ ﷺ " إِنِّي قَدْ خَبَأْتُ لَكَ خَبِيئًا ". فَقَالَ ابْنُ صَيَّادٍ هُوَ الدُّخُّ. فَقَالَ " اخْسَأْ، فَلَنْ تَعْدُوَ قَدْرَكَ ". فَقَالَ عُمَرُ ـ رضى الله عنه ـ دَعْنِي يَا رَسُولَ اللَّهِ أَضْرِبْ عُنُقَهُ. فَقَالَ النَّبِيُّ ﷺ " إِنْ يَكُنْهُ فَلَنْ تُسَلَّطَ عَلَيْهِ، وَإِنْ لَمْ يَكُنْهُ فَلاَ خَيْرَ لَكَ فِي قَتْلِهِ ". وَقَالَ سَالِمٌ سَمِعْتُ ابْنَ عُمَرَ ـ رضى الله عنهما ـ يَقُولُ انْطَلَقَ بَعْدَ ذَلِكَ رَسُولُ اللَّهِ ﷺ وَأُبَىُّ بْنُ كَعْبٍ إِلَى النَّخْلِ الَّتِي فِيهَا ابْنُ صَيَّادٍ وَهُوَ يَخْتِلُ أَنْ يَسْمَعَ مِنِ ابْنِ صَيَّادٍ شَيْئًا قَبْلَ أَنْ يَرَاهُ ابْنُ صَيَّادٍ فَرَآهُ النَّبِيُّ ﷺ وَهُوَ مُضْطَجِعٌ، يَعْنِي فِي قَطِيفَةٍ لَهُ فِيهَا رَمْزَةٌ أَوْ زَمْرَةٌ، فَرَأَتْ أُمُّ ابْنِ صَيَّادٍ رَسُولَ اللَّهِ ﷺ وَهُوَ يَتَّقِي بِجُذُوعِ النَّخْلِ فَقَالَتْ لاِبْنِ صَيَّادٍ يَا صَافِ ـ وَهْوَ اسْمُ ابْنِ صَيَّادٍ ـ هَذَا مُحَمَّدٌ ﷺ. فَثَارَ ابْنُ صَيَّادٍ فَقَالَ النَّبِيُّ ﷺ " لَوْ تَرَكَتْهُ بَيَّنَ ". وَقَالَ شُعَيْبٌ فِي حَدِيثِهِ فَرَفَصَهُ رَمْرَمَةٌ، أَوْ زَمْزَمَةٌ. وَقَالَ إِسْحَاقُ الْكَلْبِيُّ وَعُقَيْلٌ رَمْرَمَةٌ. وَقَالَ مَعْمَرٌ رَمْزَةٌ.