'Duba'ah bint Az-Zubair bin 'Abdul-Muttalib came to the Messenger of Allah and said: 'I am a heavy woman and I want to go for Hajj. How do I begin the Ihram?' He said: 'Enter Ihram and stipulate the condition that you will exit Ihram from the point where you are prevented (from continuing, if some problem should arise)."
Sunan an-Nasa'i Book 24, Hadith 149
← Previous Hadith "I asked Sa'eed bin Jubair about a man who performs Hajj and stipulates a condition. He said: 'Conditions are something that people do among themselves.' I narrated the Hadith of 'Ikrimah to him, and he narrated to me from Ibn 'Abbas, that Duba'ah bint Az-Zubair bin 'Abdul-Muttalib came to the Prophet, and said: 'O Messenger of Allah, I want to perform Hajj, so what should I say?' He said: 'Say: Labbaik Allahumma! Labbaika wa mahilli min al-ardihayth tahbisuni (Here I am, O Allah, Here I am, and I shall exit Ihram at any place where You decree that I cannot proceed.)" And whatever condition you stipulate will be accepted by your Lord."

Sunan an-Nasa'i Book 24, Hadith 148 Next Hadith → "Duba'ah bint Az-Zubair bin 'Abdul-Muttalib came to the Messenger of Allah and said: 'I am a heavy woman and I want to go for Hajj. How do I begin the Ihram?' He said: 'Enter Ihram and stipulate the condition that you will exit Ihram from the point where you are prevented (from continuing, if some problem should arise)." (Sahih) Ishaq said: I said to 'Abdur-Razzaq: Both from 'Aishah, HIsham and Az-Zuhir? He said: "Yes" Abu 'Abdur-Rahman (An-Nasa'i) said: I do not know of anyone who narrated this chain from Az-Zuhri except Ma'mar.

Sunan an-Nasa'i Book 24, Hadith 150