´Abu Hurairah narrated that the Messenger of Allah (s.a.w) said:` "Indeed a man may utter a statement that he does not see any harm in, but for which he will fall seventy autumns in the Fire."
Hadith Referenceسنن ترمذي / كتاب الزهد عن رسول الله صلى الله عليه وسلم / 2314
´Bahz bin Hakim narrated from his father, from his grandfather that Prophet (s.a.w) said:` "Woe to the one who talks about something to make the people laugh, in which he lies. Woe to him! Woe to him!"
Hadith Referenceسنن ترمذي / كتاب الزهد عن رسول الله صلى الله عليه وسلم / 2315