Sahih Bukhari Hadith

Breaking fast at the end of the day
Hadith 3.175 Narrated by Umar bin Al Khattab (Radhiallah hu Taala anhu)
Allah’s Apostle (sallallaahu alayhi wa sallam) said, ” When night falls from this side and the day vanishes from this side and the sun sets, then the fasting person should break his fast.”

Hadith 3.176 Narrated by Abdullah bin Abi Aufa (Radhiallah hu Taala anhu)
We were in the company of the Prophet (sallallaahu alayhi wa sallam) on a journey and he was fasting, and when the sun set, he addressed somebody, “O so-and-so, get up and mix Sawiq with water for us.” He replied, “O Allah’s Apostle (sallallaahu alayhi wa sallam)! (Will you wait) till it is evening?” The Prophet (sallallaahu alayhi wa sallam) said, “Get down and mix Sawiq with water for us.” He replied, “O Allah’s Apostle (sallallaahu alayhi wa sallam)! (If you wait) till it is evening.” The Prophet (sallallaahu alayhi wa sallam) said again, “Get down and mix Sawiq with water for us.” He replied, “It is still daytime.”(1) The Prophet (sallallaahu alayhi wa sallam) said again, “Get down and mix Sawiq with water for us.” He got down and mixed Sawiq for them. The Prophet (sallallaahu alayhi wa sallam) drank it and then said, “When you see night falling from this side, the fasting person should break his fast.”

Breaking fast with water or anything available

Hadith 3.177 Narrated by Abdullah bin Abi Aufa (Radhiallah hu Taala anhu)
We were traveling with Allah’s Apostle (sallallaahu alayhi wa sallam) and he was fasting, and when the sun set, he said to (someone), “Get down and mix Sawiq with water for us.” He replied, “O Allah’s Apostle (sallallaahu alayhi wa sallam)! (Will you wait) till it is evening?” The Prophet (sallallaahu alayhi wa sallam) again said, “Get down and mix Sawiq with water for us.” He replied, “O Allah’s Apostle (sallallaahu alayhi wa sallam)! It is still daytime.” The Prophet (sallallaahu alayhi wa sallam) said again, “Get down and mix Sawiq with water for us.” So, he got down and carried out that order. The Prophet (sallallaahu alayhi wa sallam) then said, “When you see night falling from this side, the fasting person should break his fast,” and he beckoned with his finger towards the east.

Hastening the breaking of the fast
Hadith 3.178 Narrated by Sahl bin Sad (Radhiallah hu Taala anhu)
Allah’s Apostle (sallallaahu alayhi wa sallam) said, ” The people will remain on the right path as long as they hasten the breaking of the fast.”

Hadith 3.179 Narrated by Ibn Abi Aufa (Radhiallah hu Taala anhu)
I was with the Prophet (sallallaahu alayhi wa sallam) on a journey, and he observed the fast till evening. The Prophet (sallallaahu alayhi wa sallam) said to a man, ” Get down and mix Sawiq with water for me.” He replied, “Will you wait till it is evening?” The Prophet (sallallaahu alayhi wa sallam) said, ” Get down and mix Sawiq with water for me; when you see night falling from this side, the fasting person should break his fast.”

Breaking fast before time by mistake
Hadith 3.180 Narrated by Abu Usama from Hisham bin Ursa from Fatima (Radhiallah hu Taala anhaa)

Asma bint Abu Bakr (Radhiallah hu Taala anhu) said, ” We broke our fast during the lifetime of the Prophet (sallallaahu alayhi wa sallam) on a cloudy day and then the sun appeared.” Hisham (Radhiallah hu Taala anhu) was asked, ” Were they ordered to fast in lieu of that day?” He replied, “It had to be made up for.” Ma’mar (Radhiallah hu Taala anhu) said, “I heard Hisham saying, ” I don’t know whether they fasted in lieu of that day or not.”