Musannaf Ibn Abi Shaybah 1819 — What is mentioned about the siwak

Hassan bin Atiyyah said: It used to be said: Ablution is half of faith, and the miswak is half of ablution. Were it not that I feared hardship for my Ummah, I would have commanded them to use the miswak at every prayer. Two rak'ahs in which the servant uses the miswak are better than seventy rak'ahs in which he does not use it.