Hadith 8:118
Abu Bakr narrated to us, he said: Ibn Mubarak narrated to us, from Khalid, from Ikrimah, from Ibn Abbas, he said: If the fingernail of the Muhrim (a person in the state of Ihram) breaks, let him cut it.
حدثنا أبو بكر قال ثنا بن مبارك عن خالد عن عكرمة عن بن عباس قال إذا انكسر ظفر المحرم فليقصه