Mishkat al-Masabih 4 Prayer كتاب الصلاة 468

وَعَن مُعَاوِيَة قَالَ: إِنَّكُمْ لَتُصَلُّونَ صَلَاةً لَقَدْ صَحِبْنَا رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَمَا رَأَيْنَاهُ يُصَلِّيهِمَا وَلَقَدْ نَهَى عَنْهُمَا يَعْنِي الرَّكْعَتَيْنِ بَعْدَ الْعَصْر. رَوَاهُ البُخَارِيّ

Mu’awiya said, “You observe a prayer which we who were the companions of God’s Messenger never saw him pray; indeed, he forbade them;”* meaning the two rak’as after the afternoon prayer. * The dual is used here, the reference being to the two rak’as . Bukhari transmitted it.