Read hadith ; know yourselves
Bismillahir rahmaanir raheem
Narrated Abu Huraira (R) : The Prophet (S) , ” 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 (salutation) and the greeting salutation of your offspring ” so , Adam said (to the angel) , 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 .
Narrated Abu Huraira (R) : He has not thanked Allah who has not thanked people .