Purification

Abu Hurayrah (may Allah be pleased with him) reported that the Prophet (may Allah's peace and blessings be upon him) said: "Had it not been that I might overburden the believers—or  my Ummah—I would have commanded them to use the Siwāk (toothstick) at every prayer."

Hudhayfah (may Allah be pleased with him) reported: When the Prophet (may Allah's peace and blessings be upon him) got up at night, he would cleanse his mouth with Siwak (tooth-stick).

‘Ā'ishah (may Allah be pleased with her) reported: Abdur-Rahmān ibn Abi Bakr visited the Prophet (may Allah's peace and blessings be upon him) as I had the Prophet's head reclined on my chest. ‘Abdur-Rahmān (may Allah be pleased with him) had a fresh tooth-stick and was brushing his teeth with. The Messenger kept his eye on it, so I took the tooth-stick, gnawed it, freshened it, and then gave it to the Prophet (may Allah's peace and blessings be upon him). He brushed his teeth with it and I had never seen the Messenger brushing his teeth more beautifully. After finishing brushing his teeth, he lifted his hand, or his finger, and said three times: "To the Highest Companion." Then, he passed away." ‘Ā'ishah would say: "He died while his head was resting between my chest and chin."