The Obligatory Acts for the Pilgrim on the Night of Muzdalifah

Question:
He says: Honorable Shaykh, may Allah grant you success. You mentioned, may Allah preserve you, in yesterday's lesson that it is not established that the Messenger of Allah (peace and blessings be upon him) stood in prayer on the night of the Day of Sacrifice at Muzdalifah. A hadith has come to my attention from Umm Salimah (may Allah be pleased with her) affirming that she stood in prayer at Muzdalifah. What is the stronger position in this matter?

Answer:
Her standing in prayer is as follows: We have not denied that she and others stood in prayer, but we say that it is not established from the Messenger (peace and blessings be upon him). Rather, he slept until he woke up and prayed the Fajr prayer in its first time. This is what is established from him (peace and blessings be upon him). Yes.