Siwaak
** (The Siwaak which is sometimes called the 'Miswak' is a cleaning
tool taken from the Arak tree.)
Abi Huraira (recorded in Ahmed/Maalik) that
the Prophet صلّى اللَّهُ عليه وسلّم said:
"If it wasn't to cause difficulty
to my nation I would have ordered them to use the Siwaak for every ablution."
[Saheeh Al-Jaami' (5319), Sheikh Albaani رحمه الله said it is saheeh].
Imaam Nawai mentions in Saheeh Muslim that,
“the siwaak is Sunnah (Mustahab: Highly recommended) and Not Waajib.”
Benefits of Siwaak - (Muslim)