Musannaf Ibn Abi Shayba 27:315

Husayn ibn Ali narrated to us, from Za'idah, from al-Hasan ibn Ubayd Allah, who said: Al-Hurr ibn al-Sayyah narrated to us, from Abd al-Rahman ibn al-Akhnas al-Nakha'i, from Sa'id ibn Zayd, who said: I heard the Messenger of Allah (peace and blessings of Allah be upon him) saying: Abu Bakr is in Paradise, and Umar is in Paradise, and Ali is in Paradise, and Uthman is in Paradise, and Talhah is in Paradise, and al-Zubayr is in Paradise, and Abd al-Rahman ibn Awf is in Paradise, and Sa'd ibn Abi Waqqas is in Paradise. And if I wished, I would have named the ninth.