for offering Tahajjud prayer.
Sahih Muslim Book 2, Hadith 61
← Previous Hadith Whenever the Messenger of Allah (ﷺ) got up for Tahajjud prayer, he cleansed his mouth with the tooth-stick.

Sahih Muslim Book 2, Hadith 60 Next Hadith → Whenever he (the Holy Prophet) got up for prayer during the night, he cleansed his mouth with the tooth-stick.

Sahih Muslim Book 2, Hadith 62