Narrated Ibn 'Abbas:
"A Bedouin came to the Messenger of Allah (ﷺ) and said: 'How shall I know that you are a Prophet?' He said: 'If I were to call this date cluster from this palm tree, would you bear witness that I am the Messenger of Allah?' So the Messenger of Allah (ﷺ) called it and they started to fall from the tree, until they fell towards the Prophet (ﷺ), then he said: 'Go back,' and it went back. So the Bedouin accepted Islam." (ES)
English reference (ES): Vol. 1, Book 46, Hadith 3628 (ES)
Arabic reference (ES): Book 49, Hadith 3988 (ES)