Abu Hamzah Al-Thumali is the first person who heard this supplication from Ali Zayn al-Abidin.
Abu Hamzah Al-Thumali was subsequently recognized as a credible narrator of hadith by important Shia scholars such as Najasi, Shaykh Tusi, Ibn Babawayh, and Ibn Shahre Ashub, but Sunni scholars have not confirmed him [REF].