عَنْ أَبِي هُرَيْرَةَ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «إِذَا وَقَعَتِ الْفَأْرَةُ فِي السَّمْنِ فَإِنْ كَانَ جَامِدًا فَأَلْقُوهَا وَمَا حَوْلَهَا وَإِنْ كَانَ مَائِعًا فَلَا تَقْرَبُوهُ» . رَوَاهُ أَحْمد وَأَبُو دَاوُد وَرَوَاهُ الدَّارمِيّ عَن ابْن عَبَّاس
Translation

Abu Huraira reported God's messenger as saying, "We have not made peace with them 1 since we fought with them, so he who leaves any of them alone through fear does not belong to us." 1. i.e. snakes.Abu Dawud transmitted it.