Abu Hurairah Radiyallahu 'anhu narrates that Nabi Sallallahu 'alaihi wasallam wasallam said: 
A man speaks a word pleasing to Allah, without considering it of any importance, yet Allah exalts him in ranks for it. And a man speaks a word displeasing to Allah, without considering it of any importance, due to which he falls into Hell. (Bukhari)
A man speaks a word pleasing to Allah, without considering it of any importance, yet Allah exalts him in ranks for it. And a man speaks a word displeasing to Allah, without considering it of any importance, due to which he falls into Hell. (Bukhari)
 
