One who prays Maghrib and 'Isha' at Muzdalifah and then departs is not considered to have fulfilled the obligatory duty

Question: We see in these days, during the departure from 'Arafah to Muzdalifah, such severe congestion that a pilgrim, upon arriving at Muzdalifah, is unable to stay the night there due to the intensity of the crowd, and finds it difficult. Is it permissible to leave Muzdalifah without staying the night? Is there any obligation on the pilgrim if he leaves without staying the night? Does praying Maghrib and 'Isha' at Muzdalifah suffice for the standing and staying the night at Muzdalifah, such that the pilgrim prays the Maghrib and 'Isha' prayers at Muzdalifah and then immediately heads to Mina? Is the standing valid in this manner? We ask for clarification of this with the mention of the evidence.

Answer: Staying the night at Muzdalifah is among the obligatory duties of Hajj, following the example of the Prophet (peace and blessings be upon him). He stayed the night there (peace and blessings be upon him), prayed Fajr there, and remained until it was clearly light, and he said: The pilgrim is not considered to have fulfilled this obligatory duty if he prays Maghrib and 'Isha' there combined and then departs, because the Prophet (peace and blessings be upon him) did not grant a dispensation except to the weak at the end of the night.
If one does not stay the night at Muzdalifah, he must offer a sacrificial animal to compensate for leaving the obligatory duty. There is disagreement among the scholars (may Allah have mercy on them) regarding whether staying the night at Muzdalifah is a pillar, an obligatory duty, or a well-known recommended practice. The strongest of the three opinions is that it is an obligatory duty, and if one leaves it, he must offer a sacrificial animal, and his Hajj is valid. This is the opinion of the majority of the scholars.
No dispensation is granted to leave before the second half of the night except for the weak. As for the strong who are not with the weak, the recommended practice for them is to remain at Muzdalifah until they pray Fajr there, remembering Allah and supplicating to Him (Glorified and Exalted is He) until it is light, and then to depart before the sun rises, following the example of the Messenger of Allah (peace and blessings be upon him). And whoever does not arrive except in the last half of the night, being among the weak, it suffices for him to remain there for some time and then depart, taking the dispensation. And success is from Allah.