It is narrated from Hazrat Bilal bin Yahya Al-Issa, may Allah have mercy on him, that the Noble Prophet, peace and blessings be upon him, said: There is no enclosure except for three things: the enclosure of a well, the enclosure of people sitting in a gathering. (The third thing is not mentioned here, but it is found in other books of hadith, and that is: the length of a horse, meaning the enclosure of the place where a person ties his horse.)