And it is narrated from ‘Amir bin Rabi‘ah (may Allah be pleased with him) that he said: I saw the Messenger of Allah (peace and blessings of Allah be upon him) using the siwak countless times while fasting. And Abu Hurairah (may Allah be pleased with him) narrated this hadith from the Prophet (peace and blessings of Allah be upon him): If it were not difficult for my ummah, I would have made the use of siwak obligatory with every ablution. A similar hadith is also narrated from Jabir and Zayd bin Khalid (may Allah be pleased with them both) from the Prophet (peace and blessings of Allah be upon him). In it, the Prophet (peace and blessings of Allah be upon him) did not specify the fasting person or anyone else. ‘A’ishah (may Allah be pleased with her) narrated this statement from the Prophet (peace and blessings of Allah be upon him): (The siwak) is a means of purifying the mouth and a cause of the Lord’s pleasure. And ‘Ata’ and Qatadah said: The fasting person may swallow his saliva.

Narrated Humran: I saw `Uthman performing ablution; he washed his hands thrice, rinsed his mouth and then washed his nose, by putting water in it and then blowing it out, and washed his face thrice, and then washed his right forearm up to the elbow thrice, and then the left-forearm up to the elbow thrice, then smeared his head with water, washed his right foot thrice, and then his left foot thrice and said, "I saw Allah's Apostle performing ablution similar to my present ablution, and then he said, 'Whoever performs ablution like my present ablution and then offers two rak`at in which he does not think of worldly things, all his previous sins will be forgiven."