Abu Ishaq Khwarizmi narrates: I asked Asim Ahwal, "Can a fasting person use a miswak?" He replied, "Yes!" I asked, "Can he use both a fresh and a dry miswak?" He replied, "Yes!" I asked, "Can he use it in both the early and the later part of the day?" He replied, "Yes!" I asked, "From whom is this reported?" He replied, "It is reported from the Prophet Muhammad (peace be upon him) on the authority of Sayyiduna Anas (may Allah be pleased with him)." The narrator of this narration, Abu Ishaq Khwarizmi, is weak.