عَنْ عَمْرِو بْنِ شُعَيْبٍ عَنْ أَبِيهِ عَنْ جَدِّهِ قَالَ: كَانَ أَكْثَرُ دُعَاءِ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ يَوْمَ عَرَفَةَ: ((لَا إِلَهَ إِلَّا اللَّهُ وَحْدَهُ لَا شَرِيكَ لَهُ لَهُ الْمُلْكُ وَلَهُ الْحَمْدُ بِيَدِهِ الْخَيْرُ وَهُوَ عَلَى كُلِّ شَيْءٍ قَدِيرٌ))
Narrated by Sayyiduna Abdullah bin Amr bin al-As (may Allah be pleased with him) that on the day of Arafah, the Messenger of Allah (peace and blessings be upon him) most frequently recited this supplication: "There is no god but Allah, alone, He has no partner, His is the dominion and His is the praise, in His hand is all good, and He has power over everything."