بُلُوغُ الْمَرَامِ
Bulugh al-Maram 230
The Book of Prayer
وَعَنْ سَبْرَةَ بْنِ مَعْبَدٍ اَلْجُهَنِيِّ - رضى الله عنه - قَالَ : قَالَ رَسُولُ اَللَّهِ - صلى الله عليه وسلم -{ لِيَسْتَتِرْ أَحَدُكُمْ فِي صَلَاتِهِ وَلَوْ بِسَهْمٍ } أَخْرَجَهُ اَلْحَاكِمُ [1]
Narrated Sabra bin Ma'bad al-Juhani (RA): Allah's Messenger (ﷺ) said: "Let one of you who is in Salat (prayer) put a Sutra in front of him even if it is an arrow." [Reported by al-Hakim].
Sunnah.com reference: Book 2, Hadith 97