Narrated `Aisha: `Abdur-Rahman bin Abi Bakr came holding a Siwak with which he was cleaning his teeth. Allah’s Apostle looked at him. I requested `Abdur-Rahman to give the Siwak to me and after he gave it to me I divided it, chewed it and gave it to Allah’s Messenger (peace be upon him). Then he cleaned his teeth with it and (at that time) he was resting against my chest.