I said: Messenger of Allah, tell me when one of us catches game and has no knife; may he slaughter with a flint and a splinter of stick. He said: Cause the blood to flow with whatever you like and mention Allah's name. (Using translation from Abū Dāʾūd 2824)
قُلْتُ يَا رَسُولَ اللهِ إِنَّ أَحَدَنَا إِذَا أَصَابَ صَيْدًا وَلَيْسَ مَعَهُ شَفْرَةٌ أَيُذَكِّي بِمَرْوَةٍ أَوْ شُقَّةِ الْعَصَا؟ قَالَ أَمْرِرِ الدَّمَ بِمَا شِئْتَ وَاذْكُرِ اسْمَ اللهِ ﷻ