Abdullah bin Mubarak عبد الله بن المبارك · The Book on Hajj

"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."