Abu Huraira reported Allah's Messenger (ﷺ) as saying:He who killed a gecko with the first stroke for him is such and such a reward, and he who killed it with a second stroke for him is such and such reward less than the first one, and he who killed it with the third stroke for him is such and such a reward less than the second one
This hadith has been reported on the authority of Abu Huraira through another chain of transmitters (and the words are):- He who killed a gecko with the first stroke for him are ordained one hundred virtues, and with the second one less than that and with the third one less than that