(82) باب فِي الرَّجُلِ يُصَلِّي فِي قَمِيصٍ وَاحِدٍ
Narrated Salamah ibn al-Akwa':
I said: Messenger of Allah, I am a man who goes out hunting; may I pray in a single shirt? He replied: Yes, but fasten it even if it should be with a thorn.
Reference: Sunan Abi Dawud 632
In-book reference: Book 2, Hadith 242
English translation: Book 2, Hadith 632