Sahih al-Bukhari 3326

ʿAbd Allah ibn Muhammad narrated to me: ʿAbd al-Razzaq narrated to us, from Maʿmar, from Hammam, from Abu Hurayra (may Allah be pleased with him), from the Prophet ﷺ, who said: ‘Allah created Adam sixty cubits tall. Then He said, “Go and greet that group of angels, and listen to how they respond; it will be your greeting and the greeting of your descendants.”’ Adam said, ‘Peace be upon you.’ They replied, ‘Peace be upon you, and Allah’s mercy,’ adding ‘and Allah’s mercy’ to his greeting. Everyone who enters Paradise will be in Adam’s form. Creation has continued to diminish in stature ever since.’