Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with him) said that the Messenger of Allah (peace and blessings be upon him) said: "I am the Prophet, that is no lie; I am the son of Abd al-Muttalib. I am the most eloquent of the Arabs; Quraysh gave birth to me, and I grew up among Banu Sa'd bin Bakr. So how could an error of speech come to me?"
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 5418