Sunan Ibn Majah
178
Sahih+2

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

SahihAl-Albani
SahihMuhammad Fouad Abd al-Baqi