Surah 2. Al-Baqara, Ayah 203

These are the days following the "Festival of Sacrifices" ('id al-adha'), which takes place on the 10th of Dhu 'l-Hijjah. The pilgrims are obliged to spend at least two of these days in the valley of Mina, about half-way between 'Arafat and Mecca.

 The 11 th -13 th  of Ⱬul-Ḥijjah, the 12 th  month of the Islamic calendar. These days are part of pilgrimage rituals.

The Appointed Days: the three days after the tenth, when the pilgrims stay on in the Valley of Mina for prayer and praise. They are the days of Tashriq (see ii. 200, n. 223). It is optional for pilgrims to leave on the second or third day.