'Aishah (May Allah be pleased with her) reported:
The Messenger of Allah (ﷺ) said, "There is no day on which Allah sets free more slaves from Hell than He does on the Day of 'Arafah."[Muslim]. (FR)
App reference (FR): Book 11, Hadith 7 (FR)
Arabic/English book reference (FR): Book 11, Hadith 1277 (FR)