Musnad Ahmad 30:1300

Abu Amir narrated to us, Fulayh narrated to us, from Hilal ibn Ali, from Abd al-Rahman ibn Abi Amrah, from Abu Hurayrah, from the Prophet, peace and blessings of Allah be upon him, who said: "Whoever believes in Allah and His Messenger, establishes the prayer, and fasts Ramadan, it is a right upon Allah to admit him into Paradise, whether he migrated in the cause of Allah or remained in the land in which he was born." They said: "O Messenger of Allah, shall we not inform the people?" He said: "Indeed, in Paradise are one hundred degrees which Allah has prepared for the mujahidin in His cause; between every two degrees is as between the heaven and the earth. So when you ask Allah, ask Him for al-Firdaws, for it is the middle of Paradise and the highest part of Paradise, and above it is the Throne of the Most Merciful, and from it gush forth—or gush forth—the rivers of Paradise." (Abu Amir was in doubt). 8420- Yunus narrated to us, Fulayh narrated to us, from Hilal ibn Ali, from Ata ibn Yasar or Ibn Abi Amrah—Fulayh said: "I do not know him except as Ibn Abi Amrah"—and he mentioned the hadith, except that he said: "the rivers of Paradise gush forth," and he said: "Shall we not inform the people of that?" He said: Then he narrated it to us and did not doubt—meaning Fulayh—he said: Ata ibn Yasar.