Purification, the Siwak – Q1

Reported by al-Tirmidhi in his Sunan, no. 23; he graded it authentic. It was also graded authentic by Shaykh al-Albani in his grading of Sunan al-Tirmidhi: If I had not feared making things difficult for my community, I would have ordered them to use the siwak at every prayer.