Muslim

Hadith Commentary:
Vocabulary of the Hadith:
al-awzaagh:
This is the plural of "wazaghah," which refers to a type of lizard (chhipkali) from the species of "saam abras" (gecko). According to Allamah Damiri, it lays eggs like a snake and spends four months of winter in its burrow, consuming nothing during this period. It is an extremely harmful creature; therefore, the Prophet (sallallahu alayhi wa sallam) commanded its killing. Here, "girgit" refers to the lizard.

Hadith Commentary:
In one hadith, the reason for killing it (the lizard) is also mentioned: it used to blow on the fire of Ibrahim (alayhis salam) to intensify it.
(Sahih al-Bukhari, Ahadith al-Anbiya, Hadith: 3359)
In another narration, there is further clarification that the Messenger of Allah (sallallahu alayhi wa sallam) said:
“When Ibrahim (alayhis salam) was thrown into the fire of Nimrod, every animal on earth tried to extinguish it, except the lizard, which was striving to intensify it by blowing on it. So the Messenger of Allah (sallallahu alayhi wa sallam) ordered that it be killed.”
Aisha (radi Allahu anha) kept a spear to finish them off.
(Sunan Ibn Majah, al-Sayd, Hadith: 3231)
Umm Sharik (radi Allahu anha) had obtained explicit permission from the Messenger of Allah (sallallahu alayhi wa sallam) to kill them.
(Sahih Muslim, al-Salam, Hadith: 5842(2237))
It should be noted that the Messenger of Allah (sallallahu alayhi wa sallam) said:
“One receives the most reward for killing it with the first strike, less for killing it with the second, and even less for finishing it with the third strike.”
(Sahih Muslim, al-Salam, Hadith: 5847(2240))

Hadith Commentary:
That is, it (the lizard) tried to fan and intensify the fire by blowing on it.
This lizard is a well-known poisonous creature that constantly changes its color.
The command to kill it is given in the noble hadith itself, and there is also reward for killing it.
In the narration, its evil action is mentioned.
This incident is absolutely true, because whatever the Messenger of Allah (sallallahu alayhi wa sallam) has stated, there can be no doubt or uncertainty about it.

Hadith Commentary:
The Messenger of Allah (sallallahu alayhi wa sallam) commanded that it be killed, and in fact, there are greater rewards for killing it with the first strike; with the second strike, the reward is less than that, and with the third strike, the reward for finishing it is even less. In any case, killing it is a meritorious act.
(Sahih Muslim, Kitab al-Salam, Hadith: 5846(2240))

Hazrat Umm Sharik (radi Allahu anha) specifically sought permission from the Messenger of Allah (sallallahu alayhi wa sallam) to kill them, as is mentioned in Sahih Muslim.
(Sahih Muslim, Kitab al-Salam, Hadith: 5843(2237))

Benefits and Issues:
The translation of "wazagh" by scholars has been as "chameleon," and by some as "lizard."
The latter translation is more correct.

Benefit:
It is established from this hadith that killing a lizard is obligatory (fard), and furthermore, one receives 100 good deeds for killing it with the first strike. (Sahih Muslim: 5847 / 2240) The reason for killing it is also mentioned in the hadith. The Messenger of Allah (sallallahu alayhi wa sallam) said: When our master Ibrahim (alayhis salam) was thrown into the fire of Nimrod, every animal on earth tried to extinguish it, except the lizard, which kept blowing on it to intensify the fire. So the Messenger of Allah (sallallahu alayhi wa sallam) ordered that it be killed. (Sunan Ibn Majah: 3231. Hasan) It should be remembered that among the jurisprudential principles (qawa'id fiqhiyyah) is that any animal which has been ordered to be killed, or any animal which has been forbidden to be killed, its consumption is unlawful (haram).