Sahih al-Bukhari 451
Sahih al-Bukhari · Book 8: Prayers (Salat) · While passing through a mosque, (one should better) hold the arrowheads (with the hand)
Narrated `Amr:
حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ ، قَالَ حَدَّثَنَا سُفْيَانُ ، قَالَ قُلْتُ لِعَمْرٍو أَسَمِعْتَ جَابِرَ بْنَ عَبْدِ اللَّهِ يَقُولُ مَرَّ رَجُلٌ فِي الْمَسْجِدِ وَمَعَهُ سِهَامٌ، فَقَالَ لَهُ رَسُولُ اللَّهِ صلى الله عليه وسلم " أَمْسِكْ بِنِصَالِهَا " .
I heard Jabir bin `Abdullah saying, "A man passed through the mosque carrying arrows. Allah's Apostle said to him, 'Hold them by their heads.' "