It is also narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: (It is not permissible) to cause harm to your brother by diminishing his rights, nor is it permissible to cause greater harm than the harm received. And a person has the right to place a beam or the like on his neighbor’s wall, and the passageway for coming and going should be left at seven hands wide.