Musnad Ahmad 31:795

Muhammad ibn Abi ‘Adi narrated to us, from Ibn ‘Awn, from al-Hasan, from Abu Sa‘id al-Khudri, from the Prophet, peace and blessings of Allah be upon him, who said: "Behold, the world is green and sweet. Behold, so fear the world, and fear women. Behold, for every treacherous person there is a banner, and the most treacherous of you is the leader of the public." He said: I have not forgotten how he raised his voice with it.