Sunan an-Nasai 15207
In-book no 471أَخْبَرَنَا قُتَيْبَةُ، قَالَ حَدَّثَنَا سُفْيَانُ، عَنِ ابْنِ الْمُنْكَدِرِ، وَإِبْرَاهِيمَ بْنِ مَيْسَرَةَ، سَمِعَا أَنَسًا، قَالَ صَلَّيْتُ مَعَ النَّبِيِّ صلى الله عليه وسلم الظُّهْرَ بِالْمَدِينَةِ أَرْبَعًا وَبِذِي الْحُلَيْفَةِ الْعَصْرَ رَكْعَتَيْنِ .
It was narrated from Ibn Al-Munkadir and Ibrahim bin Maisarah, that they heard Anas say: "I prayed Zuhr with the Prophet (ﷺ) in Al-Madinah, four Rak'ahs and 'Asr in Dhul-Hulaifah, two Rak'ahs."