Musnad Abu Ya'la al-Mawsili 155:180

Narrated to us Abd al-A’la ibn Hammad, narrated to us Hammad, from Muhammad ibn ‘Amr, from Abu Salamah, from Abu Hurayrah, and Thabit, from Abu Rafi’, from Abu Hurayrah, that the Messenger of Allah (may Allah bless him and grant him peace) said: "For the fasting person, there are two joys: a joy in the world when he breaks his fast, and a joy in the Hereafter."