Musnad Abu Ya'la al-Mawsili 108:173

Zuhayr narrated to us, Muhammad ibn Khazim narrated to us, al-A’mash narrated to us, from Abu Sufyan, from Jabir, who said: An-Nu’man ibn Qawqal came to the Prophet, may Allah bless him and grant him peace, and said: "O Messenger of Allah, if I permit the lawful, forbid the unlawful, and perform the prescribed prayers, shall I enter Paradise?" He said: "Yes."