"Abdul Malik bin Marwan wrote to Al-Hajjaj bin Yusuf telling him not to go against Ibn Umar with regard to the Hajj. On the day of Arafat, Ibn Umar came to him when the sun had passed its zenith, and I was with him, and shouted near his cotton tent: 'Where is he?' Al-Hajjaj came out to him, wearing a wrap dyed with safflower. He said: 'What is the matter, O Abu Abdur Rahman?' He said: 'We have to move on if you want to follow Sunnah.' He said to him: 'At this hour?' He said: 'Yes.' He said: 'I will pour some water over my self (have a bath) then I will come out to you.' So he waited until he came, then he walked between my father and me, I said: 'If you want to follow the Sunnah, then deliver a short Khutbah and hasten to stand (in Arafat).' He started to look at Ibn Umar so that he could hear that, and when Ibn Umar noticed that he said: 'He is speaking the truth.'"
Sunan an-Nasa'i Book 24, Hadith 388
"The Talbiyah of the Messenger of Allah was: "Labbaika Allahumma Labbaik, Labbaika la sharika laka labbaik. Innal-hamda wan-ni'mata laka wal-mulk, la sharika lak (Here I am, O Allah, here I am. Here I am, You have no partner, here I am. Verily all praise and blessings are Yours, and all sovereignty, You have no partner)." And Ibn 'Umar added: "Labbaika Labbaika wasa'daika wal-khayr fi yadika, warraghba' ilaika wal-'aml (Here I am, here I am, and at Your service; all good is in Your hands, seeking Your pleasure and striving for Your sake)."
Sunan an-Nasa'i Book 24, Hadith 132