Sahih al-Bukhari 548

Arabic

حَدَّثَنَا عَبْدُ اللَّهِ بْنُ مَسْلَمَةَ، عَنْ مَالِكٍ، عَنْ إِسْحَاقَ بْنِ عَبْدِ اللَّهِ بْنِ أَبِي طَلْحَةَ، عَنْ أَنَسِ بْنِ مَالِكٍ، قَالَ كُنَّا نُصَلِّي الْعَصْرَ ثُمَّ يَخْرُجُ الإِنْسَانُ إِلَى بَنِي عَمْرِو بْنِ عَوْفٍ فَنَجِدُهُمْ يُصَلُّونَ الْعَصْرَ‏.‏

English translation

Narrated Anas bin Malik:We used to pray the `Asr prayer and after that if someone happened to go to the tribe of Bani `Amr bin `Auf, he would find them still praying the `Asr (prayer)

Reference: Sahih al-Bukhari 548, Book of Times of the Prayers. English translation by Dr. Muhammad Muhsin Khan.