The Day of 'Arafah

[‘The best of supplications is the supplication on the day of AAarafah and the best which I and the Prophet (saws)s before me have said (is):

لَا إِلَهَ إِلَّا اللهُ وَحْدَهُ لَا شَريكَ لَهُ، لَهُ المُلْكُ ولَهُ الحَمْدُ وهُوَ عَلَى كُلِّ شَيْءٍ قَديرٌ.

La ilaha illal-lahu wahdahu la shareeka lah, lahul-mulku walahul-hamd, wahuwa AAala kulli shayin qadeer.

‘None has the right to be worshipped except Allah, alone, without partner. To Him belongs all praise and sovereignty and He is over all things omnipotent.’]