Sahih Bukhari, Hadith No. 6477: Narrated Abu Huraira (R.A): That he heard Allah's Messenger (S.A.W) saying, "A slave of Allah may utter a word without thinking whether it is right or wrong, he may slip down in the Fire as far away a distance equal to that between the east".

Sahih Bukhari, Hadith No. 6477

Narrated Abu Huraira (R.A): That he heard Allah's Messenger (S.A.W) saying, "A slave of Allah may utter a word without thinking whether it is right or wrong, he may slip down in the Fire as far away a distance equal to that between the east".