This is a third instance of discipline directed at those who hear evil talk, believe it to some extent, and start to spread it; they should not spread such talk or pass it on to others. Allah says:

﴿إِنَّ الَّذِينَ يُحِبُّونَ أَن تَشِيعَ الْفَـحِشَةُ فِى الَّذِينَ ءَامَنُواْ لَهُمْ عَذَابٌ أَلِيمٌ﴾

(Verily, those who like that Fahshah should be circulated among those who believe, they will have a painful torment) meaning, those who like to see evil talk about them (the believers) appear,

﴿لَهُمْ عَذَابٌ أَلِيمٌ فِى الدُّنْيَا﴾

(they will have a painful torment in this world) means, because of the prescribed punishment, and in the Hereafter because of the torment in Hell.

﴿وَاللَّهُ يَعْلَمُ وَأَنتُمْ لاَ تَعْلَمُونَ﴾

(And Allah knows and you know not.) means, return the matter to Him and you will be guided. Imam Ahmad recorded from Thawban that the Prophet said:

«لَا تُؤْذُوا عِبَادَ اللهِ وَلَا تُعَيِّرُوهُمْ، وَلَا تَطْلُبُوا عَوْرَاتِهِمْ، فَإِنَّهُ مَنْ طَلَبَ عَوْرَةَ أَخِيهِ الْمُسْلِمِ طَلَبَ اللهُ عَوْرَتَهُ، حَتَّى يَفْضَحَهُ فِي بَيْتِهِ»

(Do not annoy the servants of Allah, nor abuse them, nor seek their hidden shortcomings. Whoever seeks out the faults of his Muslim brother, Allah will expose his faults and degrade him, even if he is hiding in his house.)

﴿وَلَوْلاَ فَضْلُ اللَّهِ عَلَيْكُمْ وَرَحْمَتُهُ وَأَنَّ اللَّهَ رَءُوفٌ رَّحِيمٌ - يأَيُّهَا الَّذِينَ ءَامَنُواْ لاَ تَتَّبِعُواْ خُطُوَتِ الشَّيْطَـنِ وَمَن يَتَّبِعْ خُطُوَتِ الشَّيْطَـنِ فَإِنَّهُ يَأْمُرُ بِالْفَحْشَآءِ وَالْمُنْكَرِ وَلَوْلاَ فَضْلُ اللَّهِ عَلَيْكُمْ وَرَحْمَتُهُ مَا زَكَى مِنكُم مِّنْ أَحَدٍ أَبَداً وَلَـكِنَّ اللَّهَ يُزَكِّى مَن يَشَآءُ وَاللَّهُ سَمِيعٌ عَلِيمٌ ﴾

(20. And had it not been for the grace of Allah and His mercy on you, and that Allah is full of kindness, Most Merciful.) (21. O you who believe! Follow not the Khutuwat of Shaytan. And whosoever follows the footsteps of Shaytan, then, verily, he commands Al-Fahsha' and the evil deeds. And had it not been for the grace of Allah and His mercy on you, not one of you would ever have been pure from sins. But Allah purifies whom He wills, and Allah is All-Hearer, All-Knower.)