Sahih al-Bukhari
Sahih al-Bukhari 498
To offer As-Salat (the prayer) using a Harba (a short spear) (as a Sutra)
Arabic hadith text
حَدَّثَنَا مُسَدَّدٌ، قَالَ حَدَّثَنَا يَحْيَى، عَنْ عُبَيْدِ اللَّهِ، أَخْبَرَنِي نَافِعٌ، عَنْ عَبْدِ اللَّهِ، أَنَّ النَّبِيَّ صلى الله عليه وسلم كَانَيُرْكَزُ لَهُ الْحَرْبَةُ فَيُصَلِّي إِلَيْهَا.
Translation
Narrated `Abdullah
The Prophet (ﷺ) used to get a Harba planted in front of him (as a Sutra) and pray behind it.