`Sayyiduna Abu Hurairah (may Allah be pleased with him) narrates from the Noble Prophet (peace and blessings be upon him) that he (peace be upon him) said: Whoever makes someone his mawla (protector or client) without the permission of his masters, upon him is the curse of Allah, the angels, and all people, and on the Day of Resurrection, neither his obligatory nor his voluntary deeds will be accepted.