Abdullah bin Umar reported,

We were with the Messenger of Allah ﷺ when we passed by some boys, among whom was Ibn Sayyad. The boys ran away, but Ibn Sayyad remained seated. The Messenger of Allah ﷺ seemed displeased by this, and the Prophet ﷺ said to him, "May your hands be covered in dust, do you bear witness that I am the Messenger of Allah?"He replied, "No, rather you bear witness that I am the messenger of Allah."Umar bin Khattab said, "Let me deal with him, Messenger of Allah, so I may kill him."The Messenger of Allah ﷺ replied, "If he is the one you suspect, you will not be able to kill him."In another wording, We were walking with the Prophet ﷺ when he passed by Ibn Sayyad. The Messenger of Allah ﷺ said to him, "I have concealed something for you, what is it?"He answered, "Dukh."The Messenger of Allah ﷺ said, "Be gone, you will never exceed your limits."Umar said, "Messenger of Allah, let me strike off his head."The Messenger of Allah ﷺ replied, "Leave him. If he is the one you fear, you will not be able to kill him."

عن عبد الله قال

كنا مع رسول الله ﷺ فمررنا بصبيان فيهم ابن صياد، ففر الصبيان، وجلس ابن صياد فكأن رسول الله ﷺ كره ذلك فقال له النبي ﷺ: تربت يداك أتشهد أني رسول الله؟ فقال: لا بل تشهد أني رسول الله، فقال عمر بن الخطاب: ذرني يا رسول الله حتى أقتله، فقال رسول الله ﷺ: إن يكن الذي ترى فلن تستطيع قتله. وفي لفظ: كنا نمشي مع النبي ﷺ فمر بابن صياد، فقال له رسول الله ﷺ قد خبأت لك خبيئا، فقال: دخ، فقال رسول الله ﷺ: اخسأ فلن تعدو قدرك، فقال عمر: يا رسول الله، دعني فأضرب عنقه، فقال رسول الله ﷺ: دعه، فإن يكن الذي تخاف لن تستطيع قتله.