ذِكْرُ رُؤْيَةِ الْمُصْطَفَى ﷺ ابْنَ صَيَّادٍ بِالْمَدِينَةِ
We were walking with Messenger of Allah ﷺ that Ibn Sayyad happened to pass by him. Messenger of Allah ﷺ said to him: I have concealed for you (something to test you, so tell me that). He said: It is Dukh. Thereupon Messenger of Allah ﷺ said to him: Be off. You cannot get farther than your rank, whereupon 'Umar said: Messenger of Allah, permit me to strike his neck. Thereupon Messenger of Allah ﷺ said: Leave him; if he is that one (Dajjal) whom you apprehend, you will not be able to kill him. (Using translation from Muslim 2924b)
كُنْتُ أَمْشِي مَعَ رَسُولِ اللَّهِ ﷺ فَمَرَّ بِابْنِ صَيَّادٍ فَقَالَ النَّبِيُّ ﷺ «إِنِّي قَدْ خَبَّأْتُ لَكَ خَبْأً» فَقَالَ هُوَ الدَّخُّ فَقَالَ النَّبِيُّ ﷺ «اخْسَأْ فَلَنْ تَعْدُوَ قَدْرَكَ» قَالَ فَقَالَ عُمَرُ ؓ دَعْنِي فَأَضْرِبَ عُنُقَهُ قَالَ «لَا إِنْ يَكُنِ الَّذِي تَخَافُ فَلَنْ تَسْتَطِيعَ قَتْلَهُ»