Narrated Abdullah ibn Abbas:
Sa'id ibn Jubayr said: I said to Abdullah ibn Abbas: AbulAbbas, I am
surprised to see the difference of opinion amongst the companions of
the Apostle (peace_be_upon_him) about the wearing of ihram by the
Apostle of Allah (peace_be_upon_him) when he made it obligatory.
He replied: I am aware of it more than the people. The Apostle of
Allah (peace_be_upon_him) performed only one hajj. Hence the people
differed among themselves. The Apostle of Allah (peace_be_upon_him)
came out (from Medina) with the intention of performing hajj. When
he offered two rak'ahs of prayer in the mosque at Dhul-Hulayfah, he
made it obligatory by wearing it.
At the same meeting, he raised his voice in the talbiyah for hajj,
when he finished his two rak'ahs. Some people heard it and I
retained it from him. He then rode (on the she-camel), and when it
(the she-camel) stood up, with him on its back, he raised his voice
in the talbiyah and some people heard it at that moment. This is
because the people were coming in groups, so they heard him raising
his voice calling the talbiyah when his she-camel stood up with him
on its back, and they thought that the Apostle of Allah
(peace_be_upon_him) had raised his voice in the talbiyah when his
she-camel stood up with him on its back.
The Apostle of Allah (peace_be_upon_him) proceeded further; when he
ascended the height of al-Bayda' he raised his voice in the
talbiyah. Some people heard it at that moment. They thought that he
had raised his voice in the talbiyah when he ascended the height of
al-Bayda'. I swear by Allah, he raised his voice in the talbiyah at
the place where he prayed, and he raised his voice in the talbiyah
when his she-camel stood up with him on its back, and he raised his
voice in the talbiyah when he ascended the height of al-Bayda'.
Sa'id (ibn Jubayr) said; He who follows the view of Ibn Abbas raises
his voice in talbiyah (and ihram) at the place of is prayer after he
finishes two rak'ahs of his prayer.