Abu Sa'id al-Khudri (Allah be pleased with him) reported that the Messenger of Allah (ﷺ) forbade to observe fast on two days the day of Fitr and the day of Sacrifice ('Id-ul-Adha).
| Reference | : Sahih Muslim 827c |
| In-book reference | : Book 13, Hadith 180 |
| USC-MSA web (English) reference | : Book 6, Hadith 2536 |
| (deprecated numbering scheme) |