مِشْكَاةُ الْمَصَابِيحِ
Mishkat al-Masabih 383
Purification
The tooth-stick - Section 2
وَعَنْ عَائِشَةَ قَالَتْ: كَانَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ لَا يَرْقُدُ مِنْ لَيْلٍ وَلَا نَهَارٍ فَيَسْتَيْقِظُ إِلَّا يَتَسَوَّكُ قَبْلَ أَنْ يَتَوَضَّأَ. رَوَاهُ أَحْمد وَأَبُو دَاوُد
‘A'isha said that the Prophet (ﷺ) did not awake after sleeping by night or by day without using the tooth-stick before performing ablution. Ahmad and Abu Dawud transmitted it.
Mishkat al-Masabih, 383حسن (الألباني)