Al-Maarri

They all err - Muslims, Christians, Jews and Magians. There are two kinds of humans - the intelligent, who have no religion, and the religious, who have no intellect.

Give a drink of water as alms to the birds which go forth at morning, and deem that they have a better right than men [to thy charity]. For their race brings not harm upon thee in any wise, when thou fearest it from thine own race.