Hawzah News Agency – The commander of the faithful, Imam Ali peace be upon him says:

إيّاكَ أن تُسِي‏ءَ الظَّنَّ؛ فإنّ سُوءَ الظَّنِّ يُفسِدُ العِبادَةَ.

 ‘Beware of entertaining suspicious thoughts for verily suspicion corrupts worship.’

Source: Ghurar al-Hikam, no. 2709