حَدَّثَنَا مُسَدَّدٌ، حَدَّثَنَا عَبْدُ الْوَاحِدِ، حَدَّثَنَا سُلَيْمَانُ الشَّيْبَانِيُّ، قَالَ سَمِعْتُ عَبْدَ اللَّهِ بْنَ أَبِي أَوْفَى، يَقُولُ سِرْنَا مَعَ رَسُولِ اللَّهِ صلى الله عليه وسلم وَهُوَ صَائِمٌ فَلَمَّا غَرَبَتِ الشَّمْسُ قَالَ ‏"‏ يَا بِلاَلُ انْزِلْ فَاجْدَحْ لَنَا ‏"‏ ‏.‏ قَالَ يَا رَسُولَ اللَّهِ لَوْ أَمْسَيْتَ ‏.‏ قَالَ ‏"‏ انْزِلْ فَاجْدَحْ لَنَا ‏"‏ ‏.‏ قَالَ يَا رَسُولَ اللَّهِ إِنَّ عَلَيْكَ نَهَارًا ‏.‏ قَالَ ‏"‏ انْزِلْ فَاجْدَحْ لَنَا ‏"‏ ‏.‏ فَنَزَلَ فَجَدَحَ فَشَرِبَ رَسُولُ اللَّهِ صلى الله عليه وسلم ثُمَّ قَالَ ‏"‏ إِذَا رَأَيْتُمُ اللَّيْلَ قَدْ أَقْبَلَ مِنْ هَا هُنَا فَقَدْ أَفْطَرَ الصَّائِمُ ‏"‏ ‏.‏ وَأَشَارَ بِأُصْبُعِهِ قِبَلَ الْمَشْرِقِ ‏.‏

Narrated 'Abd Allah b. Abi Awfa: We went along with the Messenger of Allah (PBUH) while he was fasting. When the sun set, he said to Bilal: Bilal, come down and prepare barley beverage for us. He said: Messenger of Allah, would that you waited for the evening. He said: Come down and prepare barley beverage for us. He said: Messenger of Allah, the say still remains on you (i.e. there remains the brightness of the day). He said: Come down and prepare barley drink for us. So he came down and prepared barley drink. The Messenger of Allah (PBUH) drank it and said: When you see that the night approaches from this side, he who fasts has reached the time to break it ; and he pointed to the east with his finger. Translation Not Available

Book Ref: Sunan Abi Dawud Book 14 Hadith 2352
Web Ref:  Sunan Abi Dawud Book 13 Hadith 2345