Salim bin 'Abdullah bin 'Umar سالم بن عبد الله بن عمر بن الخطاب · The Book on Hajj

"When the Prophet wanted to Perform Hajj, he announced it to the people, and they gathered (to accompany him). When he reached Al-Baida he assumed Ihram"

He heard Sa'd bin Abi Waqas, and Ad-Dahhak bin Qais while they were mentioning Tamattu after "Umrah until Hajj. Ad-Dahhak bin Qais said: "No one does that except one who is ignorant of the order of Allah, Most High." Sa'd said: "How horrible is it what you have said O my nephew!" So Ad-Dahhak (bin Qais) said: "Indeed Umar bin Al-Khattab has prohibited that." So Sa'd said: "The Messenger of Allah did it, and we did it with him."

"Duba'ah bint Az-Zubair came to the prophet and said: 'O Messenger of Allah! I want to perform Hajj so should I state a condition?' He said: 'Yes.' She asked: 'So how should I say it?' He said: 'Say; "Labbaik Allahumma labbaika mahilli minal Ard haithu tahbisuni (I respond to Your call O Allah, I respond to Your call, I will exit Ihram any where on the earth where You prevent me."