وَعَنْ أَبِي هُرَيْرَةَ
أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ: «مَنْ قَتَلَ وَزَغًا فِي أولَّ ضَرْبَة كتبت لَهُ مِائَةُ حَسَنَةٍ وَفِي الثَّانِيَةِ دُونَ ذَلِكَ وَفِي الثَّالِثَة دون ذَلِك»
The Prophet (sallallahu alayhi wa sallam) said:, “If anyone kills a gecko with the first blow a hundred good deeds will be recorded for him, less if he kills it at the second and less still if he kills it at the third.”
Mishkat al-Masabih 3956, Book 21, Game and Animals Which May Be Slaughtered, Hadith 57. 1 min read