Hadith 8:2823
Abu Bakr narrated to us, he said: Abd al-A’la narrated to us, from Hisham ibn Hassan, from Hisham ibn Urwah, from his father, that he used to see no harm in the Muhrim (a person in the state of Ihram) wearing a money belt (hamyan) if he was securing his expenses in it.
حدثنا أبو بكر قال نا عبد الأعلى عن هشام بن حسان عن هشام بن عروة عن أبيه أنه كان لا يرى بأسا أن يلبس المحرم الهميان إن كان يحرز فيه نفقته