Narrated Anas bin Malik:

On the day of the Conquest, the Prophet entered Mecca, wearing a helmet on his head. When he took it off, a man came and said, "Ibn Khatal is clinging to the curtain of the Ka'ba." The Prophet ﷺ said, "Kill him." (Malik a sub-narrator said, "On that day the Prophet was not in a state of Ihram as it appeared to us, and Allah knows better.")

حَدَّثَنَا يَحْيَى بْنُ قَزَعَةَ، حَدَّثَنَا مَالِكٌ، عَنِ ابْنِ شِهَابٍ، عَنْ أَنَسِ بْنِ مَالِكٍ ـ رضى الله عنه ـ أَنَّ النَّبِيَّ ﷺ دَخَلَ مَكَّةَ يَوْمَ الْفَتْحِ وَعَلَى رَأْسِهِ الْمِغْفَرُ، فَلَمَّا نَزَعَهُ جَاءَ رَجُلٌ فَقَالَ ابْنُ خَطَلٍ مُتَعَلِّقٌ بِأَسْتَارِ الْكَعْبَةِ. فَقَالَ " اقْتُلْهُ " قَالَ مَالِكٌ وَلَمْ يَكُنِ النَّبِيُّ ﷺ فِيمَا نُرَى وَاللَّهُ أَعْلَمُ يَوْمَئِذٍ مُحْرِمًا.