What is the ruling on using others' property, such as shoes, pens, food, and drink, without their permission, when their consent is presumed, and what if their owners permit their use, and what if their source is ill-gotten wealth?

It is permissible to eat from the homes of relatives and friends, and from places whose keys one possesses, if the owner's good will in this matter is known. Permission can be explicit or customary. As for using tools acquired with unlawful money, if the item itself is unlawful (like stolen or usurped property), then it is not permissible to use it, and it must be returned. However, if it was purchased with unlawful money, then there is a detailed explanation for that.