Volume 4, Book 55, Number 543:
Narrated Abu Huraira:
The Prophet said, “Allah created Adam, making him 60 cubits tall. When He created him, He said
to him, “Go and greet that group of angels, and listen to their reply, for it will be your greeting (sa –
lutation) and the greeting (salutations of your offspring.” So, Adam said (to the angels), As-Salamu
Alaikum (i.e. Peace be upon you). The angels said, “As-salamu Alaika wa Rahmatu-l-lahi” (i.e. Peace
and Allah’s Mercy be upon you). Thus the angels added to Adam’s salutation the expression, ‘Wa
Rahmatu-l-lahi,’ Any person who will enter Paradise will resemble Adam (in appearance and
figure). People have been decreasing in stature since Adam’s creation.