Jami` at-Tirmidhi Book 47, Hadith 340
"The moon was split during the time of the Messenger of Allah (ﷺ). So the Messenger of Allah (ﷺ) said: 'Bear witness.'"
"The moon was cleft asunder during the time of the Messenger of Allah (ﷺ), so the Prophet (ﷺ) said to us: 'Bear witness.'"
from his father who said: "The moon was split during the time of the Messenger of Allah (ﷺ) until it became as two sections, one above this mountain and one above that mountain. So they said: 'Muhammad has cast a spell upon us.' Some of them said: 'If he could cast a spell upon us, he can not cast a spell upon all of the people.'"