Sayyiduna Sahl bin Sa'd (may Allah be pleased with him) narrates that the Prophet (peace and blessings be upon him) said: "Jibril instructed me to use the miswak until I thought that I would lose my teeth."
Al-Tabarani recorded it in al-Mu'jam al-Kabir and al-Mu'jam al-Awsat; its chain contains a narrator, Ubaydullah bin Waqid, who is da'if (weak).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الصلاة / 2562