Saeed narrates that Abdullah bin Umar (may Allah be pleased with them both) came to Abdullah bin Zubair (may Allah be pleased with him) and said, "O Ibn Zubair! Refrain from committing irreligion in the sanctuary of Allah, for I heard the Messenger of Allah (peace and blessings be upon him) say that soon a man from the Quraysh will commit irreligion in this sanctuary. If his sins are weighed against the sins of all jinn and mankind, his sins will outweigh them. Beware, lest you become that person."