It was narrated from Abu Bakrah that the Messenger of Allah ﷺ said:
“Modesty is part of faith, and faith will be in Paradise. Obscenity in speech is part of harshness and harshness will be in Hell.’”

حَدَّثَنَا إِسْمَاعِيلُ بْنُ مُوسَى، حَدَّثَنَا هُشَيْمٌ، عَنْ مَنْصُورٍ، عَنِ الْحَسَنِ، عَنْ أَبِي بَكْرَةَ، قَالَ قَالَ رَسُولُ اللَّهِ ﷺ " الْحَيَاءُ مِنَ الإِيمَانِ وَالإِيمَانُ فِي الْجَنَّةِ وَالْبَذَاءُ مِنَ الْجَفَاءِ وَالْجَفَاءُ فِي النَّارِ " .