أَخْبَرَنَا أَحْمَدُ بْنُ سُلَيْمَانَ، قَالَ حَدَّثَنَا عُبَيْدُ اللَّهِ، قَالَ أَنْبَأَنَا إِسْرَائِيلُ، عَنْ أَبِي حَصِينٍ، عَنْ شَقِيقٍ، قَالَ كُنَّا نُؤْمَرُ إِذَا قُمْنَا مِنَ اللَّيْلِ أَنْ نَشُوصَ أَفْوَاهَنَا بِالسِّوَاكِ .
It was narrated that Shaqiq said: "We were commanded, when we got up to pray at night, to clean our mouths with the siwak." Translation Not Available
Book Ref: Sunan An Nisai Book 20 Hadith 1624
Web Ref: Sunan An Nisai Vol 2 Book 20 Hadith 1625