The Messenger of Allah ﷺ said, "The best thing that I and the prophets before me have said on the evening of Arafah is, '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.'"
قال رسول الله ﷺ: أفضل ما قلت أنا والنبيون قبلي عشية عرفة: لا إله إلا الله وحده لا شريك له، له الملك وله الحمد وهو على كل شيء قدير.
Tabarani related it in Al-Dua (874) through the route of Qays bin Rabi, from Aghar bin Sabbah, from Khalifa bin Husayn, from Ali , and he mentioned it. In the chain is Qays bin Rabi Asadi, Abu Muhammad Kufi, about whom there is disagreement. Affan bin Muslim said, "Qays was trustworthy, Thawri and Shuba both considered him trustworthy." Abu Dawud Tayalisi said, "Shuba said to us, 'Catch up with Qays before he dies.'" And from Walid Tayalisi, who said, "Qays bin Rabi was trustworthy, his hadith was hasan, Muaz bin Muaz narrated from him." But Imam Ahmad found him weak and Ibn Main declared him daif, and Abdul-Rahman bin Mahdi used to narrate from him then abandoned doing so.The reason for this, as Jafar bin Aban said, "I asked Ibn Numayr about Qays bin Rabi." He said, "He had a son who was his affliction. The hadith scholars examined his books and found his hadiths objectionable, thinking that his son had altered them." Likewise Abu Dawud said, "Qays bin Rabi was only compromised because of his son. His son used to take other people's hadiths and insert them into the folds of Qays's book, without the old man being aware of it." The summary regarding him is what Ibn Adi said, "Most of his narrations are sound, and the correct view about him is what Shuba said, that there is no harm in him."Once it becomes clear that he did not do this deliberately and is not accused of it, we find for his hadith a strong mursal corroborating narration, which is what Malik related (1/422) from Ziyad bin Abu Ziyad, the freedman of Abdullah bin Ayyash bin Abu Rabia, from Talha bin Ubaydullah bin Kurayz, that the Messenger of Allah ﷺ said, "The best supplication is the supplication on the day of Arafah, and the best of what I have said, and what the prophets before me said, is, 'There is no god but Allah, alone, without partner.'"Talha bin Ubaydullah bin Kurayz, with the ka fatha and the za sakinah, was a Khuzai successor. Abdullah bin Ahmad said, "I asked my father about him." He said, "Trustworthy." The practice of the early generations also supports this. From Abu Shuba, who said, "I watched Ibn Umar while he was at Arafah so I could hear what he was supplicating." He said, "He did not add anything beyond saying, 'There is no god but Allah, alone, without partner, His is the dominion and His is the praise, and He is capable of all things.'" Bayhaqi mentioned this (5/117) in this manner as a suspended report.Tabarani related it in Al-Dua (878) with his chain from Abdullah bin Harith, that Ibn Umar, on the evening of Arafah, would raise his voice, and he mentioned it, adding after it, "O Allah, guide us with guidance, adorn us with piety, and forgive us in the last life and the first." Then he would lower his voice, then say, "O Allah, I ask You from Your bounty and Your giving for good, blessed provision. O Allah, You have commanded supplication and have decreed upon Yourself the response, and You do not break Your promise nor falsify Your promise. O Allah, whatever good You love, make it beloved to us and make it easy for us, and whatever You dislike, make it disliked to us, and keep us away from it, and do not remove Islam from us after You have granted it to us." End of quote. Its narrators are trustworthy.In the same meaning is what was also narrated from Amr bin Shuayb, from his father, from his grandfather, that the Prophet ﷺ said, "The best supplication is the supplication on the day of Arafah, and the best of what I have said, and what the prophets before me said, is, 'There is no god but Allah, alone, without partner, His is the dominion and His is the praise, and He is capable of all things.'" Tirmidhi related it (3585) from Abu Amr Muslim bin Amr, who said, "Abdullah bin Nafi narrated to me, from Hammad bin Abu Humayd, from Amr bin Shuayb, from his father, from his grandfather," and he mentioned it.Tirmidhi said, "This is a gharib hadith from this route, and Hammad bin Abu Humayd is Muhammad bin Abu Humayd, Abu Ibrahim Ansari Madani, who is not strong according to the hadith scholars." Hafiz said in Taqrib, "He is Ansari Zurqi, nicknamed Hammad, daif." Imam Ahmad related it through his route (6961).As for the statement of Haythami in Al-Majmu (3/252), "His narrators are all deemed trustworthy," this is not accurate, for Hammad bin Abu Humayd is daif by consensus of the scholars, and Ibn Hibban did not mention him among the trustworthy narrators. This hadith of Abdullah bin Amr, despite its weakness, when joined to the mursal narration of Talha bin Ubaydullah, becomes strong, because Ibn Adi said about Hammad bin Abu Humayd, "Despite his weakness, his hadith is recorded."On this subject there is also what was narrated from Ali
, who said, the Messenger of Allah ﷺ said, "Most of my supplication and the supplication of the prophets before me at Arafah is, 'There is no god but Allah, alone, without partner, His is the dominion and His is the praise, and He is capable of all things. O Allah, place light in my heart, light in my hearing, and light in my sight. O Allah, expand my chest for me and make my affair easy for me. I seek refuge in You from the whisperings of the chest, the trial of the grave, and the scattering of affairs, and I seek refuge in You from the evil of what comes in the night and the day, and from what the winds bring.'" Ibn Abdul-Barr related it in Al-Tamhid (6/39), and Bayhaqi (5/117), both through the route of Musa bin Ubayda, from his brother Abdullah bin Ubayda, from Ali
.Bayhaqi said, "Musa bin Ubayda narrated it alone, and he is daif, and his brother did not meet Ali
." I say, it is as he said. This Musa bin Ubayda is Rabazi, and the scholars are unanimous in declaring him daif.On this subject there are also other hadiths from Umar, Ibn Abbas, Ibn Masud, and others, and none of them is free from being daif, or from an unknown narrator, or from someone whose narration cannot be relied upon. The sahih view on this subject is what I have mentioned.