Abu Hurayra reported that the Messenger of Allah, may Allah blesshim and grant him peace, said, "What is the most frequent reason for someoneentering the Garden?" He said, "Taqwa and good character. He was asked,"What is the most frequent reason for people entering the Fire?" He replied,"The two empty ones:
the mouth and the genitals."
English reference: Book 14, Hadith 294
Arabic reference: Book 1, Hadith 294