the Messenger of Allah ﷺ said, "The faith of a servant is not upright until his heart is upright; and his heart is not upright until his tongue is upright; and a man will not enter Paradise if his neighbor is not secure from his evil."
قَالَ رَسُولُ اللهِ ﷺ «لَا يَسْتَقِيمُ إِيمَانُ عَبْدٍ حَتَّى يَسْتَقِيمَ قَلْبُهُ؛ وَلَا يَسْتَقِيمُ قَلْبُهُ حَتَّى يَسْتَقِيمَ لِسَانُهُ؛ وَلَا يَدْخُلُ الْجَنَّةَ رَجُلٌ لَا يَأْمَنُ جَارُهُ بَوَائِقَهُ۔»