Narrated `Amr bin `Amir: Anas said, "The Prophet used to perform ablution for every prayer." I asked Anas, "What did you used to do?' Anas replied, "We used to pray with the same ablution until we break it with Hadath."
Hadith Referenceصحيح البخاري / كتاب الوضوء / 214
Hadith Gradingمحدثین:أحاديث صحيح البخاريّ كلّها صحيحة
Narrated Anas: I saw the most famous people amongst the companions of the Prophet hurrying towards the pillars at the Maghrib prayer before the Prophet came for the prayer.
Hadith Referenceصحيح البخاري / كتاب الصلاة / 503
Hadith Gradingمحدثین:أحاديث صحيح البخاريّ كلّها صحيحة
Narrated Anas bin Malik: "When the Mu'adh-dhin pronounced the Adhan, some of the companions of the Prophet would proceed to the pillars of the mosque (for the prayer) till the Prophet arrived and in this way they used to pray two rak`at before the Maghrib prayer. There used to be a little time between the Adhan and the Iqama." Shu`ba said, "There used to be a very short interval between the two (Adhan and Iqama).
Hadith Referenceصحيح البخاري / كتاب الأذان / 625
Hadith Gradingمحدثین:أحاديث صحيح البخاريّ كلّها صحيحة