Chapter: The Siwak and the Sunnahs of Ablution

Using a siwak—a soft, freshly trimmed twig that is neither harmful nor prone to splintering, rather than one’s finger or a cloth—is a sunnah at all times. Once the sun has passed its zenith, however, it is discouraged for someone who is fasting. The practice is especially stressed when preparing for prayer, on waking from sleep, or whenever the mouth’s odor changes.

One should move the siwak horizontally, beginning with the right side of the mouth, and apply oil intermittently.