What are the matters prescribed for the pilgrim on the Day of 'Arafah, and when does the standing at 'Arafah begin and end?

Question : May Allah keep you safe, Honorable Shaykh. This is the great standing, the standing at 'Arafah. There are matters prescribed for the pilgrim. What are these matters prescribed for the pilgrim at the standing at 'Arafah? When does the pilgrim depart from it? When does the time for standing at 'Arafah begin? And when does it end?

Answer : Among the most important things done in this great standing is the prayer; indeed, it is the most important thing. The people pray the midday and afternoon prayers combined and brought forward at 'Arafah. Not two rak'ahs, two rak'ahs. Then, the person devotes himself to supplication and remembrance, saying: and he supplicates to Allah the Exalted with whatever he wishes, until the sun sets. When the sun sets, he travels from 'Arafah to Muzdalifah. The time for the standing is from the sun passing its zenith on the ninth day until the dawn of the tenth day. However, the Sunnah is to depart from 'Arafah when the sun sets. What did the Prophet do?