When you want to kill a rat, and killing it is *mustahhab* (encouraged), then kill well. Kill it with what will take its life immediately, and do not hurt it.

And from hurting it, is what some people do where they put down something adhesive to which it will be glued, then they leave it to die of hunger and thirst. And this is not permissible. When you put this adhesive catcher (in place), it's incumbent on you to repeatedly check and watch out such that when you see anything glued to it, you kill it.

But for you to leave this adhesive catcher for 2 or 3 days and the rat is glued to it and dies of thirst or hunger, it is feared that you may enter hell fire for that, for the prophet, peace and blessings be upon him said: A woman entered hell because of a cat which she imprisoned until it died, she neither give it food nor did she free it to eat from the vermin of the earth.

�Sharh Riyaadus- Saalih 4/596

⏰If kindness is expected in killing a filthy rat, then what is to be said about those who take sacred souls unlawfully in the most heinous and unimaginable way. May Almighty Allah be with us (Amin).

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JazaakaLlahu Khayran brother.

iamgenius:
JazaakaLlahu Khayran brother.

Wa iyaakum

There's also Islamic ruling on how to kill a rat?

sorextee:
There's also Islamic ruling on how to kill a rat?

you should thank Allah for Islam