Musnad Abu Ya'la al-Mawsili 110:69

Abu Khaythama narrated to us, Ibn 'Uyayna narrated to us, from 'Amr, from Sa'id ibn Jubayr, from Ibn 'Abbas, who said: I heard the Prophet, may Allah bless him and grant him peace, while he was delivering a sermon, and he was saying: "Indeed, you will meet Allah barefoot, naked, uncircumcised, and on foot."