The Book of Pilgrimage
كتاب الحج
Read the English translation first, with the original Arabic directly underneath.
It is permissible for the Muhrim to stipulate a condition for exiting Ihram because of sickness and the like
Ibn 'Umar (Allah be pleased with them) reported that the Messenger of Allah (ﷺ) said:
The people of Medina should enter upon the state of Ihram at Dhu'l-Hulaifa, and people of Syria at Juhfa, and people of Najd at Qarn (al-Manazil), and 'Abdullah (further) said: It has reached me that the Messenger of Allah (ﷺ) also caid: The people of Yemen should enter upon the state of Ihram at Yalamlam.
وَحَدَّثَنَا يَحْيَى بْنُ يَحْيَى، قَالَ قَرَأْتُ عَلَى مَالِكٍ عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، - رضى الله عنهما - أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " يُهِلُّ أَهْلُ الْمَدِينَةِ مِنْ ذِي الْحُلَيْفَةِ وَأَهْلُ الشَّامِ مِنَ الْجُحْفَةِ وَأَهْلُ نَجْدٍ مِنْ قَرْنٍ " . قَالَ عَبْدُ اللَّهِ وَبَلَغَنِي أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " وَيُهِلُّ أَهْلُ الْيَمَنِ مِنْ يَلَمْلَمَ " .