Sahih Muslim Book 6, Hadith Number 2420.

Chapter : Excellence of taking meal before dawn, stress on giving It preference and preference for deferring it (at the fag end of the night) and hastening in breaking it.

Abu ‘Atiyya reported: I and Misruq went to ‘Aisha (Allah be pleased with her) and Masruq said to her: There are two persons among the Companions of Muhammad (may peace be upon him) none of whom abandons the good, but one of them hastens to observe sunset prayer and break the fast, and the other delays in observing the sunset prayer and in breaking the fast, whereupon she said: Who hastens to observe sunset prayer and break the fast? He said: It is ‘Abdullah. Upon this she said: This is how the Messenger of Allah(may peace be upon him) used to do.