Narrated Abu Burdah:

On the authority of his father ( Abu Musa al-Ash'ari), reported (according to the version of Musaddad) : We came to the Apostle of Allah (ﷺ) to provide us with a mount, and found him using the tooth-stick, its one end being at his tongue (i.e. he wsa rinsing his mouth).

According to the version of Sulaiman it goes : I entered upon the Prophet (ﷺ ) who was using the tooth-stick, and had it placed at one side of his tongue, producing a gurgling sound.

Abu Dawud said : Musaddad said that the tradition was a lengthy but he shortened it.

حَدَّثَنَا مُسَدَّدٌ، وَسُلَيْمَانُ بْنُ دَاوُدَ الْعَتَكِيُّ، قَالاَ حَدَّثَنَا حَمَّادُ بْنُ زَيْدٍ، عَنْ غَيْلاَنَ بْنِ جَرِيرٍ، عَنْ أَبِي بُرْدَةَ، عَنْ أَبِيهِ، قَالَ مُسَدَّدٌ قَالَ أَتَيْنَا رَسُولَ اللَّهِ ﷺ نَسْتَحْمِلُهُ فَرَأَيْتُهُ يَسْتَاكُ عَلَى لِسَانِهِ - قَالَ أَبُو دَاوُدَ وَقَالَ سُلَيْمَانُ قَالَ دَخَلْتُ عَلَى النَّبِيِّ ﷺ وَهُوَ يَسْتَاكُ وَقَدْ وَضَعَ السِّوَاكَ عَلَى طَرَفِ لِسَانِهِ - وَهُوَ يَقُولُ " إِهْ إِهْ " . يَعْنِي يَتَهَوَّعُ . قَالَ أَبُو دَاوُدَ قَالَ مُسَدَّدٌ فَكَانَ حَدِيثًا طَوِيلاً اخْتَصَرْتُهُ .