Musnad Ahmad 903:6

Mu'adh ibn Hisham narrated to us, my father narrated to me, from Qatadah, from 'Abdullah ibn Sarjis, that the Prophet (peace and blessings of Allah be upon him) said: "Let not one of you urinate into a hole. And when you sleep, extinguish the lamp, for the mouse takes the wick and burns the people of the house. And tie the water skins, and cover the vessels, and lock the doors at night." They said to Qatadah: "What is disliked about urinating in a hole?" He said: "It is said that they are the dwellings of the Jinn."