While passing through a mosque, (one should better) hold the arrowheads (with the hand)
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 ".
Narrated `Amr: 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.' "