It is narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) forbade hanging a garment in prayer and that a person covers his face (in prayer).
Hadith Referenceصحيح ابن خزيمه / جماع أبواب اللباس فى الصلاة / 772