It was narrated that Abu Hurairah said:
"The Messenger of Allah said: 'Do you crowd one another in order to see the moon on the night when it is full?' They said: 'No.' He said: 'And you will not crowd one another in order to see your Lord on the Day of Resurrection.'"
English reference: Vol. 1, Book 1, Hadith 178
Arabic reference: Book 1, Hadith 183