Muwatta Imam Malik Book of Purity, Hadith 117

Yahya related to me from Malik from Ibn Shihab from Humayd ibn Abdar-Rahman ibn Awf that Abu Hurayra said, "Were it not that he would be overburdening his community he (the Messenger of Allah ﷺ) would have ordered them to use a tooth-stick with each wudu."

وَحَدَّثَنِي عَنْ مَالِكٍ، عَنِ ابْنِ شِهَابٍ، عَنْ حُمَيْدِ بْنِ عَبْدِ الرَّحْمَنِ بْنِ عَوْفٍ، عَنْ أَبِي هُرَيْرَةَ، أَنَّهُ قَالَ لَوْلاَ أَنْ يَشُقَّ، عَلَى أُمَّتِهِ لأَمَرَهُمْ بِالسِّوَاكِ مَعَ كُلِّ وُضُوءٍ .