عَنْ حُذيفَةَ رَضِيَ اللّهُ عَنْهُ قَالَ: كَانَ النَّبِيُّ صَلَّى اللّهُ عَلَيْهِ وَسَلَّمَ إِذَا قَامَ مِنَ النَّوْمِ يَشُوصُ فَاهُ بِالسِّوَاكِ. مُتَّفَقٌ عَلَيْهِ.
Hudhayfah (may Allah be pleased with him) reported: When the Prophet (peace and blessings be upon him) rose from sleep, he would rub his mouth with the siwak. Agreed upon (al-Bukhari and Muslim).
الشرح · explanation
يَشُوصُ: الشَّوْصُ هو الدَّلْكُ.
"He would rub" (yashusu): al-shaws means rubbing and scrubbing.
الدروس · lessons
استحباب السواك عقب الاستيقاظ من النوم لإذهاب ما قد ينشأ عنه من تغير الفم. أدب النّبيّ صَلَّى اللّهُ عليه وَسَلَّمَ وتأدّبه مع ربِّـه، فيستاك، ويُطيّب فمه قبل أن يقف بين يدي ربِّـه.
The recommendation of using the siwak upon waking from sleep, to remove any change in the mouth's odor that may have arisen from it. The Prophet's (peace and blessings be upon him) etiquette and refined conduct with his Lord: he would use the siwak and freshen his mouth before standing before his Lord.