Hadith 8:1280
Abu Bakr narrated to us, he said: Waki’ narrated to us, from ‘Umar ibn Dharr, he said: I asked Mujahid and ‘Ata’ regarding the *muhrim* (a person in the state of ihram) who performs ablution, and some hairs fall out. They both said: There is nothing upon him.
حدثنا أبو بكر قال حدثنا وكيع عن عمر بن ذر قال سألت مجاهدا وعطاء عن المحرم يتوضأ فتقع الشعرات فقالا ليس عليه شيء