(38) باب اسْتِحْبَابِ قَتْلِ الْوَزَغِ
Abu Huraira reported Allah's Messenger (ﷺ) as saying (that he who kills a gecko) with the first stroke there are seventy rewards for him.
Reference: Sahih Muslim 2240 c
In-book reference: Book 39, Hadith 199
USC-MSA web (English) reference(deprecated numbering scheme): Book 26, Hadith 5566