Hadith 8:2317
Abu Bakr narrated to us, he said: Ibn ‘Ulayyah narrated to us, from al-Taymi, from Abu Mijlaz, who said: I saw Ibn ‘Umar scratching his head while he was in the state of ihram. I paid close attention, and behold, he was scratching it with his fingertips.
حدثنا أبو بكر قال حدثنا بن علية عن التيمي عن أبي مجلز قال رأيت بن عمر يحك رأسه وهو محرم فتفطنت فإذا هو يحكه بإنامله