Musnad Abu Ya'la al-Mawsili 117:148

Suwayd ibn Sa'id narrated to us, al-Hakam ibn Sinan Abu 'Awn narrated to us, from Thabit, from Anas, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Indeed, Allah took a handful and said, 'For Paradise, by My mercy.' And He took a handful and said, 'For the Fire, and I do not care.'"