The Messenger of Allah ﷺ said, "Whoever kills a gecko with the first strike will receive such and such reward of good deeds. Whoever kills it on the second strike will receive such and such reward, less than the first. And if he kills it on the third strike, he will receive such and such reward, less than the second."In another wording, "Whoever kills a gecko with the first strike, one hundred good deeds are recorded for him. With the second strike, less than that. With the third strike, less than that."And in another wording, "Seventy good deeds for the first strike."
قال رسول الله ﷺ: من قتل وزغة في أول ضربة فله كذا وكذا حسنة، ومن قتلها في الضربة الثانية فله كذا وكذا حسنة، لدون الأولى، وإن قتلها في الضربة الثالثة فله كذا وكذا حسنة، لدون الثانية وفي لفظ: من قتل وزغا في أول ضربة كتبت له مائة حسنة، وفي الثانية دون ذلك، وفي الثالثة دون ذلك. وفي لفظ: في أول ضربة سبعين حسنة.
Muslim narrated it in the chapter on greeting (2240) through multiple routes from Suhayl, from his father, from Abu Hurairah, and he mentioned it. Jareer also narrated it from Suhayl, with the same chain, using the second wording. Muslim also narrated it from Muhammad bin Sabbah, who said, Ismail bin Zakariya narrated to us, from Suhayl, who said, my sister narrated to me, from Abu Hurairah, and he mentioned it with the third wording.On this subject there is also a report from Saibah, the freed servant of Fakih bin Mughira, that she visited Ayesha and saw a spear placed in her house. She said, "O Mother of the Believers, what do you do with this?" Ayesha said, "We kill geckos with it, for the Prophet of Allah ﷺ told us that when Ibrahim was thrown into the fire, there was no creature on earth that did not try to put out the fire, except the gecko, which kept blowing on it to fan the flames. So the Messenger of Allah ﷺ ordered that it be killed."This was narrated by Ibn Majah (3231), Ahmad (24534, 24780), and Ibn Hibban (5631), all of them through multiple routes from Jareer bin Hazim, from Nafi, from Saibah, the freed servant of Fakih bin Mughira, and he mentioned it.As for the aforementioned Saibah, no one narrated from her except Nafi, and no one deemed her trustworthy except Ibn Hibban, who mentioned her among his trustworthy narrators (4/351). As for Busiri's statement in Misbah Zujaja (3/66), "Its chain is sahih," this is based on his reliance on Ibn Hibban's designation of trustworthiness, and Ibn Hibban is known among the majority of scholars for being lenient in vouching for the trustworthiness of unknown narrators.