Upon arriving at মুযদালিফা after sunset from আরাফাত, the first priority is combining Maghrib (3 rak'ahs) and Isha (shortened to 2 rak'ahs) সালাতs. নবী করীম (সাল্লাল্লাহু আলাইহি ওয়া সাল্লাম) combined these two সালাতs at মুযদালিফা with one adhan and two iqamas. This should be done soon after arrival — do not delay the সালাতs unnecessarily to settle in.
The requirement for staying at মুযদালিফা varies by school. The Shafi'i and Hanbali schools consider staying at মুযদালিফা even for a moment after midnight as fulfilling the wajib (ওয়াজিব act). The Maliki school requires staying most of the night. The Hanafi school considers the stay at মুযদালিফা as wajib, and departing before Fajr without excuse requires fidyah. The strongest practice is to stay from arrival until after Fajr সালাত, then depart for মিনা before sunrise — this is the Sunnah of নবী করীম.
During the night, collect 49 pebbles (or 70 if staying in মিনা for 3 days of Tashreeq) for the stoning ritual at জামারাত. Pebbles should be slightly larger than a chickpea. Sleep under the open sky — there are no tent structures at মুযদালিফা. Make dua and dhikr, especially at the Mash'ar al-Haram area. The night at মুযদালিফা is a profound spiritual experience of simplicity and equality, as all হাজীগণ — rich and poor — sleep on the bare ground together.