The Prophet ﷺ was asked, "What most often leads people into Paradise?"He replied, "Mindfulness of Allah and good character."He was then asked, "What most often leads people into the Fire?"He answered, "The two hollow things, the mouth and the private parts."
حدثنا هارون بن إسحق وعبد الله بن سعيد قالا حدثنا عبد الله بن إدريس عن أبيه وعمه عن جده
سئل النبي ﷺ ما أكثر ما يدخل الجنة قال التقوى وحسن الخلق وسئل ما أكثر ما يدخل النار قال الأجوفان الفم والفرج
Its isnad is sahih.Tirmidhi transmitted it in the chapters on Kindness and Ties of Kinship, chapter on what has been said about good character, hadith 2004, from the hadith of Ibn Idris with this wording, and he said it is sahih gharib, but he did not mention "and his uncle," whose name is Dawud bin Yazid bin Abdul-Rahman Awdi Zaafari.