Aishah narrated:
"The Prophet looked at the moon and he said: 'O Aishah! Do you seek refuge with Allah from the evil of this? For indeed this is Al-Ghasiqu Idha Waqab (The darkened one as it darkens).'" (ID)
English reference (ID): Vol. 5, Book 44, Hadith 3366 (ID)
Arabic reference (ID): Book 47, Hadith 3692 (ID)