Al-Tabarani recorded it in al-Mu'jam al-Awsat with these words: "I was commanded to use the miswak until I feared for my teeth." Its chain contains a narrator, Ata bin al-Sa'ib.
Al-Tabarani also recorded it in al-Mu'jam al-Kabir, and its chain also contains Ata bin al-Sa'ib.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الصلاة / 2558