Musnad Abu Ya'la al-Mawsili 160:191

Muhammad ibn Bakkar narrated to us, Abu Ma'shar narrated to us, from Sa'id, from Abu Hurayrah, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "When the Day of Resurrection arrives, the angels and the prophets will intercede, until it is said regarding one of them: 'Whoever had in his heart the weight of a dinar,' then it is said: 'half a dinar,' then it is said: 'a qirat,' then it is said: 'half a qirat,' then it is said: 'a barleycorn,' then it is said: 'a mustard seed.' When the people of Paradise enter Paradise and the people of the Fire enter the Fire, the Compeller (Al-Jabbar) will say: 'The creation has interceded for the creation, but the mercy of the Creator remains.' He said: Then He will take a handful from Hell and cast it into the River of Life. He said: Then they will sprout as the vegetation sprouts. Have you not seen the seed in the silt of the flood? That which was exposed to the sun was green, and that which was in the shade was white. They said: 'O Messenger of Allah, it is as if you were looking at the seed when it sprouts!' He said: Then they will enter Paradise. He said: Then it will be said: 'These are the freed ones of the Most Merciful.'"