[2. Surah Al-Baqarah : Ayah 43]
And keep up prayer and pay the poor-rate and bow down with those who bow down.
Duration of Fast[2. Surah Al-Baqarah: Ayah 187]
And eat and drink until the whiteness of the day becomes distinct from the blackness of the night at dawn, then complete the fast till night.
Doing Sehri Late
[Sahih Bukhari : volume 3, Book 31, Number 140]
Narrated Hazrat Adi bin Hatim (Radi Allah Anhu): When the above verses was revealed: "Until the white thread appears to you , distinct from the black thread," I took two (hair) strings one black and one white , and kept them under my pillow and went on looking at them throughout the night but could not make anything out of it. So, the next morning I went to Allah's Messenger Muhammad (sal-allahu- alleihi-wasallam ), and told him the whole story. He explained me, "That the verse means the darkness of night and blackness of drawn."
[Sahih Bukhari : volume 3, Book 31, Number 146]
Narrated Anas bin Malik (Radi Allah Anhu), The Prophet Muhammad (sal-allahu- alleihi-wasallam ) said, "Take Sehri as there is a blessing in it."
Interval between Sehri and Fajr Prayer
[Sahih Bukhari : volume 3, Book 31, Number 144]
Narrated Hazrat Anas (Radi Allah Anhu) : Zaid bin Thabit (Radi Allah Anhu) said, " We took the Sehri with Prophet Muhammad (sal-allahu- alleihi-wasallam ) then He (sal-allahu- alleihi-wasallam ) stood for As-Salat (the prayer)." I asked, "What was the interval between the Sahur and the Adhan?" He replied, "The interval was sufficient to recite fifty verses of Quran."
Doing Iftar Early
[Sahih Bukhari : volume 3, Book 31, Number 178]
Narrated Hazrat Sahl bin Sa'd (Radi Allah Anhu): Allah's Messenger Muhammad (sal-allahu- alleihi-wasallam ) said, "The people will remain on the right path as long as they hasten the Iftar."
[Sahih Bukhari : volume 3, Book 31, Number 177]
Narrated Ibn Abi Aufa (Radi Allah Anhu), Prophet Muhammad (sal-allahu- alleihi-wasallam ) said, "When you see night falling from this side, the person observing fast should break its fast", and he beckoned with his finger towards east.
[Sahih Bukhari : volume 3, Book 31, Number 180]
Hazrat Asma bin Abi Bakr (Radi Allah Anhu) said, "We broke our fast during the lifetime of the Prophet Muhammad (sal-allahu- alleihi-wasallam ) on a cloudy day and then the sun appeared."
Our Lord, pour down upon us patience, and make our steps firm and assist us against the unbelieving people.