Standing at the Sacred Site is not obligatory on the Hajj Pilgrim
Question :
During my Hajj this year and after 'Arafah, I went to Muzdalifah and I spent the night there. However, I forgot to go to the Sacred Site (Al-Mash'aril-Haram). Is there any sin on me for this?
Answer:
There is no sin on you if you spent the night in Muzdalifah in any place there, and there is no harm if you did not go to the Sacred Site (Al-Mash'aril-Haram). For verily, the Prophet stood at the Sacred Site and said:
"I have stood here and all of Jam' is a place of standing."
The word Jam' means Muzdalifah. Any place where you stood in it and spent the night in it, then that is sufficient. That which seems apparent from the statement of the Prophet: "I have stood here and all of Jam' is a place of standing," is that it is not necessary for the person to burden himself and go through difficulty in order to reach the Site. Rather, he may stand at his place where he is when he offers the Fajr prayer, and then supplicate to Allâh. Then, he pushes on to Mina.
Source:
Ash-Shaykh Ibn 'Uthaimin
Fatawa Islamiyah, Vol. 4 Pages 226-227