"I said to Ibn 'Umar: 'I saw you begin the Talbiyah when your she-camel stood up with you. He said: "The Messenger of Allah used to begin the Talbiyah when his she-camel stood up with him."
Sunan an-Nasa'i Book 24, Hadith 142
← Previous Hadith That he used to narrate that the Prophet began the Talbiyah when his mount stood up with him.

Sunan an-Nasa'i Book 24, Hadith 141 Next Hadith → "The Messenger of Allah stayed for nine years during which he did not perform Hajj. Then it was announced among the people the he was going for Hajj. No one who was able to come riding or on foot stayed behind, and the people rushed to go out with him until he came to Dhul-Hulaifah. Asam' bint 'Umais gave birth to Muhammad bin Abi Bakr and she sent word to the messenger of Allah (Asking what she should do). He said: 'Perform Ghusl and wrap a cloth around your private parts, then begin the Talbiyah.' So she did that." An abridgment

Sunan an-Nasa'i Book 24, Hadith 143