It was narrated from Abu Hurairah that the Messenger of Allah ﷺ said:
“Whoever kills a house lizard with one blow will have such and such a reward. Whoever kills it with two blows will have such and such a reward,” less than the first. “And whoever kills it with three blows will have such and such reward,” less than that mentioned the second time.

حَدَّثَنَا مُحَمَّدُ بْنُ عَبْدِ الْمَلِكِ بْنِ أَبِي الشَّوَارِبِ، حَدَّثَنَا عَبْدُ الْعَزِيزِ بْنُ الْمُخْتَارِ، حَدَّثَنَا سُهَيْلٌ، عَنْ أَبِيهِ، عَنْ أَبِي هُرَيْرَةَ، عَنْ رَسُولِ اللَّهِ ﷺ قَالَ " مَنْ قَتَلَ وَزَغًا فِي أَوَّلِ ضَرْبَةٍ فَلَهُ كَذَا وَكَذَا حَسَنَةً وَمَنْ قَتَلَهَا فِي الثَّانِيَةِ فَلَهُ كَذَا وَكَذَا - أَدْنَى مِنَ الأُولَى - وَمَنْ قَتَلَهَا فِي الضَّرْبَةِ الثَّالِثَةِ فَلَهُ كَذَا وَكَذَا حَسَنَةً - أَدْنَى مِنَ الَّذِي ذَكَرَهُ فِي الْمَرَّةِ الثَّانِيَةِ " .