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.

Abdullah bin Amir bin Rabi'ah narrates from his father: "I saw the Prophet Muhammad (peace be upon him) using a miswak while fasting." Other narrators are more reliable compared to Asim bin Ubaidullah.

Abdullah bin Amir bin Rabi’ah narrates from his father:“I have seen the Prophet Muhammad (peace be upon him) using the miswak several times while fasting.”

This narration is also transmitted with some other chains of transmission.

Sayyiduna Abu Hurairah (may Allah be pleased with him) narrates: I heard the Noble Prophet (peace and blessings be upon him) say: "You are permitted to use the miswak until the ‘Asr prayer; when you have performed ‘Asr, then put it aside. The smell from the mouth of a fasting person is purer to Allah Almighty than the fragrance of musk."

Sayyida Aisha (may Allah be pleased with her) narrates: The Noble Prophet (peace and blessings be upon him) said: "The best deed for a fasting person is using the miswak." In another narration, these words are mentioned: "Among the best deeds of a fasting person is using the miswak." The other narrators are more reliable than the narrator named Mujalid.

Sayyiduna Ali (may Allah be pleased with him) said: "When you fast, use the miswak in the morning, but do not use the miswak in the evening. The reason is that if a fasting person's lips are dry in the evening, then this will be a light for him on the Day of Resurrection."

The same narration is also transmitted with another chain from Sayyiduna Khabbab (may Allah be pleased with him) from the Prophet Muhammad (peace and blessings be upon him). The narrator named Abu ‘Umar Kaysan is not reliable, and the narrator between him and Sayyiduna ‘Ali (may Allah be pleased with him) is not known.