سُنَنُ النَّسَائِيِّ
Sunan an-Nasa’i 1624
The Book of Qiyam Al-Lail (The Night Prayer) and Voluntary Prayers During the Day
Mentioning the discrepancies reported from Abu Hasin 'Uthman Bin 'Asim in this hadith
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."
Sunan an-Nasa'i, 1624Sahih (Darussalam)