There is no day when God sets free more servants from Hell than the Day of 'Arafa. He draws near, then praises them to the angels, saying: What do these want?
Sahih Muslim Book 15, Hadith 492
← Previous Hadith Abu Bakr Siddiq (Allah be pleased with him) sent me during Hajj before the Farewell Pilgrimage for which Allah's Messenger (ﷺ) had appointed him an Amir, among a group of people whom he had ordered to make announcement to the people on the Day of Nahr:" After this year no polytheist may perform the Pilgrimage and no naked person may circumambulate the House." Ibn Shihab stated that Humaid b. Abd al-Rahman said that according to this narration of Abu Huraira (Allah be pleased with him) the day of Hajj al-Akbar (Great Hajj) is this Day of Nahr (10th of Dhu'l-Hijja).

Sahih Muslim Book 15, Hadith 491 Next Hadith → An Umra is an expiation for the sins committed between it and the next, and Hajj which is accepted will receive no other reward than Paradise.

Sahih Muslim Book 15, Hadith 493