hadith
499
۞
The Prophet (SAWA) said, 'Gabriel continuously advises me about brushing teeth, that I really thought he would lay it down as an obligation.
رسولُ اللهِ (صَلَّيَ اللهُ عَلَيهِ وَ آلِهِ): مازالَ جَبرئيلُ يُوصِيني بالسِّواكِ حتّى ظَنَنتُ أنّهُ سَيَجعَلُهُ فَريضَةً .