Sahih Muslim 1207
Sahih Muslim · Book 15: The Book of Pilgrimage · It is permissible for the Muhrim to stipulate a condition for exiting Ihram because of sickness and the like
وَحَدَّثَنَا عَبْدُ بْنُ حُمَيْدٍ ، أَخْبَرَنَا عَبْدُ الرَّزَّاقِ ، أَخْبَرَنَا مَعْمَرٌ ، عَنْ هِشَامِ بْنِ عُرْوَةَ ، عَنْ أَبِيهِ ، عَنْ عَائِشَةَ ، - رضى الله عنها - مِثْلَهُ .
This hadith has been reported on the authority of A'isha through another chain of transmitters.