The best dua on the Day of Arafah

The Prophet ﷺ said: "The best dua is the dua of the Day of Arafah, and the best of what I and the prophets before me have said is:

lā ilāha illā Allāhu waḥdahū lā sharīka lahū, lahū al-mulk wa-lahu al-ḥamd, wa-huwa ʿalā kulli shayʾin qadīr

(There is no god but Allah alone, with no partner. To Him belongs the dominion, and to Him belongs all praise, and He has power over all things.)"

أَنَّ النَّبِيَّ ﷺ قَالَ: «خَيْرُ الدُّعَاءِ دُعَاءُ يَوْمِ عَرَفَةَ، وَخَيْرُ مَا قُلْتُ أَنَا وَالنَّبِيُّونَ مِنْ قَبْلِي:

لاَ إِلَهَ إِلاَّ اللَّهُ وَحْدَهُ لاَ شَرِيكَ لَهُ، لَهُ الْمُلْكُ وَلَهُ الْحَمْدُ، وَهُوَ عَلَى كُلِّ شَيْءٍ قَدِيرٌ».