Muwatta Malik 10
Sahih Graded by Salim al-Hilali Book of The Times of Prayer · Hadith 10 of 1,858وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ إِسْحَاقَ بْنِ عَبْدِ اللَّهِ بْنِ أَبِي طَلْحَةَ، عَنْ أَنَسِ بْنِ مَالِكٍ، أَنَّهُ قَالَ كُنَّا نُصَلِّي الْعَصْرَ ثُمَّ يَخْرُجُ الإِنْسَانُ إِلَى بَنِي عَمْرِو بْنِ عَوْفٍ فَيَجِدُهُمْ يُصَلُّونَ الْعَصْرَ .
Yahya related to me from Malik from Ishaq ibn Abdullah ibn Abi Talha that Anas ibn Malik said, "We would pray asr and anyone who then went to the Bani Amr ibn Awf would find them praying asr
References
Muwatta Malik 10
In-book: Book 1, Hadith 10 Source: hadith-api (fawazahmed0)