Mishkat al-Masabih 10 The Rites of Pilgrimage كتاب المناسك 97

وَعَن ابنِ عبَّاسٍ أَنَّهُ دَفَعَ مَعَ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَوْمَ عَرَفَةَ فَسَمِعَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ وَرَاءَهُ زَجْرًا شَدِيدًا وَضَرْبًا لِلْإِبِلِ فَأَشَارَ بِسَوْطِهِ إِلَيْهِمْ وَقَالَ: «يَا أَيُّهَا النَّاسُ عَلَيْكُمْ بِالسَّكِينَةِ فَإِنَّ الْبِرَّ لَيْسَ بِالْإِيضَاعِ» . رَوَاهُ البُخَارِيّ

Ibn ‘Abbas said that he returned with the Prophet on the day of ‘Arafa, and when the Prophet heard the people behind him shouting loudly at their camels and beating them, he pointed his whip at them and said, “You people must preserve a quiet demeanour, for piety does not consist in going quickly.” Bukhari transmitted it.