(Al-Hujurath) 49 : 12
يَا أَيُّهَا الَّذِينَ آمَنُوا اجْتَنِبُوا كَثِيرًا مِنَ الظَّنِّ إِنَّ بَعْضَ الظَّنِّ إِثْمٌ ۖ وَلَا تَجَسَّسُوا وَلَا يَغْتَبْ بَعْضُكُمْ بَعْضًا ۚ أَيُحِبُّ أَحَدُكُمْ أَنْ يَأْكُلَ لَحْمَ أَخِيهِ مَيْتًا فَكَرِهْتُمُوهُ ۚ وَاتَّقُوا اللَّهَ ۚ إِنَّ اللَّهَ تَوَّابٌ رَحِيمٌ

Oh you who believed!  You avoid many of the guesses, indeed some of the guesses are sins, and you shouldn’t do spy work; you shouldn’t tell defamation about one another from among you in their absence; will any of you like to eat the meat of your brother who died? Then you hate it, and you heed Allah, indeed Allah is Oft-repenting, the Merciful.

It is only with Confirmed Truth-Adhikr-one can get confirmed belief. So the believers without following the assumption and conjectures should confirm any matter based on the Proof from Adhikr. The believers who are leading a life witnessing the Three Time Knower Lord and entrusting upon Him won’t do any spy work, or hear others speeches secretly or read the letters of others or try to reveal others secrets, and also shouldn’t talk about other believers badly in their absence which will be so hateful like eating the meat of died brother. The Fujjar who are involved in these prohibited deeds are the true disbelievers as explained in verses 4: 150-151 who haven’t transformed their Jinn comrade in to believers as explained in verses 43: 36-39. As told in the verse 17: 17, The Messenger and believers are always in a conscious that the Three Time Knower Lord is enough to acquaint and observe the offences of His servants. Through the verses 25: 58-59, the Messenger Muhammed is commanded to entrust upon the One who lives forever and dies not, and to Glorify and Praise Him, and He is enough to acquaint the offences of His servants; the One who created Heavens, earth and all that in between them in six days, then He established on the Throne, the Impartial, so you ask about Him to the Three Time Knower. In this Era where there is no a group of believers anywhere in the world, the mode of prayer and life style of believers are explained in verses 7: 205-206. See explanation 6: 116; and 26: 221-223.