Upon receiving the verse, the Prophet [s] stopped on that place (the pond of Khumm) which was extremely hot. Then he sent for all people who have been ahead in the way, to come back and waited until all pilgrims who fell behind, arrived and gathered. He ordered Salman [r] to use rocks and camel toolings to make a pulpit (minbar) so he could make his announcement. It was around noon time in the first of the Fall, and due to the extreme heat in that valley, people were wrapping their robes around their feet and legs, and were sitting around the pulpit, on the hot rocks.
On this day the Messenger of Allah [s] spent approximately five hours in this place; three hours of which he was on the pulpit. He recited nearly one hundred verses from The Glorious Quran, and for seventy three times reminded and warned people of their deeds and future. Then he gave them a long speech.
The following is a part of his speech which has been widely narrated by the Sunni traditionists:
source : http://www.al-islam.org