The Obligations of Hajj.

The Shaykh : As for the obligations, they are that the ihram must be entered from the miqat, meaning that it is obligatory to enter ihram from the miqat. If one enters ihram before reaching the miqat, his ihram is valid, but he must offer a sacrificial animal according to the scholars. Standing at 'Arafah until nightfall.
Staying overnight at Muzdalifah, as detailed in what we mentioned. Staying overnight at Mina. Stoning the pillars. The farewell circumambulation.