Al-Matalib al-'Aliyah 1239 — Supplication on the Day of Arafah

It is narrated from Sayyiduna Ali (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "The words most often said by me and by all the prophets before me in the plain of Arafat are these: 'La ilaha illallahu wahdahu la sharika lah, lahul-mulku wa lahul-hamdu, wa huwa 'ala kulli shay'in qadir' (There is none worthy of worship except Allah, alone, without any partner; His is the dominion and His is all praise, and He has full power over all things). 'Allahummaj'al fi sam'i nuran, wa fi basari nuran, wa fi qalbi nuran' (O Allah, place light in my hearing, place light in my sight and place light in my heart). 'Allahummashrah li sadri, wa yassir li amri' (O Allah, open my breast for me and make my affair easy for me); cf. "My Lord, expand for me my breast, and ease for me my task" [Surah Ta-Ha: 25-26]. 'Wa a'udhu bika min waswasis-suduri wa shatatil-umur' (And I seek refuge in You from the whisperings of the hearts and from the scattering and disorder of affairs). 'Allahumma a'udhu bika min sharri ma yaliju fil-layli, wa min sharri ma yaliju fin-nahari, wa min sharri ma tahubbu bihir-riyahu, wa sharri bawa'iqid-dahr' (O Allah, I seek refuge in You from the evil that enters in the night, and from the evil that enters in the day, and from the calamities that the winds carry, and from the destructive and ruinous misfortunes of time)."
Imam Ishaq bin Rahwayh recorded this narration in his Musnad. This supplication sets out the best manner of affirming the Oneness of Allah and seeking comprehensive well-being on the blessed occasion of Arafat, although the narrator in its chain, Musa bin Ubaydah, has been declared da'if (weak) by the Imams of narrator criticism (al-jarh wa al-ta'dil).