Is permission required to seek shade under the shadow of someone else's house or tree, and is it permissible to adorn oneself using someone else's car mirror without their permission?

A Muslim is not required to seek permission to shade himself with the shadow of a house or a tree, or to adorn himself using a car mirror, as long as it does not cause harm to the owner. Scholars have stated the permissibility for a Muslim to benefit from something that does not harm the owner, such as using the light from another's lamp or shading oneself with its shadow.