Obligatory Aspects of Hajj

1- Assuming Ihram from the meeqaat;
the Prophet ﷺ after listing the mawaqeet said: “Those mawaqeet are for their residents and non residents who pass through them with the intention of making Hajj or ‘Umrah.” [ Source: Bukhari.]


2- Standing on ‘Arafah until sunset for those that stayed there in the day,
because the Prophet ﷺ stayed there until sunset.


3- Spending the night at Muzdalifah,
because the Prophet ﷺ spent the night there. He said: “My nation should take its religious rites (from me), because I do not know if I shall be with them after this year.” [ Source: Ibn Majah.] He ﷺ permitted the weak Muslims (to leave for Mina) only after the middle of the night. This indicates that spending the night in Muzdalifah is obligatory, and Allah ordered the pilgrims to engage in His remembrance at Al-Mash’ar Al-Haram (Muzdalifah).


4- Passing the night in Mina during the days of Tashreeq
as it is established that the Prophet ﷺ permitted the camel herders to not spend the night at Mina. [ Source: Abu Ya’la in his Musnad.] This shows that the original ruling is that spending the night in Mina is obligatory.


5- Stoning the Jamraat:
Allah says: “And remember Allah during (specific) numbered days.” (al-Baqara: 203). The specific numbered days: The days of at-Tashreeq.


Stoning the pillars is a form of remembrance of Allah, the Most High, due to the Prophet’s statement ﷺ: “Indeed circumambulating the House, (the circuits) between as-Safa and al-Marwa, and stoning the pillars; all have been ordained to serve as a (form of) remembrance of Allah.” [ Source: Abu Dawud.]


6- Shaving and trimming the hair:
Allah says; “Certainly, you shall enter al-Masjid al-Haram, if Allah wills, secure, (some) having their heads shaved, and (some) having their hairs cut short.” (al-Fath: 27)


7- Farewell circumambulation (Tawaaf Al-Wada’):
as confirmed on the authority of Ibn Abbas t: “The people were ordered to make the last of their worship (to be) at the House, but this has been waived for the menstruating women.” [ Source: Muslim.]
source: islamkingdom