"Taqwa of Allah, and good character." And he was asked about that for which people are admitted into the Fire the most, and he said: " The mouth and the private parts." (Using translation from Tirmidhī 2004)
سُئِلَ رَسُولُ اللهِ ﷺ عَنْ أَكْثَرِ مَا يَلِجُ النَّاسُ النَّارَ فَقَالَ الْأَجْوَفَانِ الْفَمُ وَالْفَرْجُ وَسُئِلَ عَنْ أَكْثَرِ مَا يَلِجُ بِهِ الْجَنَّةَ فَقَالَ رَسُولُ اللهِ ﷺ حُسْنُ الْخُلُقِ