Hadith 8:3248
Abu Bakr narrated to us, he said: Ma'n ibn 'Isa narrated to us, from Muhammad ibn Hilal, he said: I saw 'Umar ibn 'Abd al-'Aziz, when he ascended the pulpit of the Prophet, may Allah bless him and grant him peace, he would take off his sandals.
حدثنا أبو بكر قال نا معن بن عيسى عن محمد بن هلال قال رأيت عمر بن عبد العزيز إذا رقى منبر النبي صلى الله عليه وسلم خلع نعليه