Sunan an-Nasa'i, Volume 3, Book 24, Hadith 2768 (DarusSalam) ⓘ
It was narrated that Ibn 'Abbas said: '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)."
أَخْبَرَنِي عِمْرَانُ بْنُ يَزِيدَ، قَالَ أَنْبَأَنَا شُعَيْبٌ، قَالَ أَنْبَأَنَا ابْنُ جُرَيْجٍ، قَالَ أَنْبَأَنَا أَبُو الزُّبَيْرِ، أَنَّهُ سَمِعَ طَاوُسًا، وَعِكْرِمَةَ، يُخْبِرَانِ عَنِ ابْنِ عَبَّاسٍ، قَالَ جَاءَتْ ضُبَاعَةُ بِنْتُ الزُّبَيْرِ إِلَى رَسُولِ اللَّهِ صلى الله عليه وسلم فَقَالَتْ يَا رَسُولَ اللَّهِ إِنِّي امْرَأَةٌ ثَقِيلَةٌ وَإِنِّي أُرِيدُ الْحَجَّ فَكَيْفَ تَأْمُرُنِي أَنْ أُهِلَّ قَالَ " أَهِلِّي وَاشْتَرِطِي إِنَّ مَحِلِّي حَيْثُ حَبَسْتَنِي " .
also referenced under: Hadith 2767 (Reference) & Book 24, Hadith 0 (In-Book)