Ok, so this isn’t quite a quiz, but definitely an important checklist of things we need to do (or not do), in order that we may be counted amongst the mutaqoon (those who have taqwa):
The sign of scrupulous piety (al-wara`) is considering ten things mandatory upon oneself:
1. Guarding the tongue from backbiting due to the saying of the Most High: “Do not backbite one another.” [49:12]
2. Shunning suspicion due to the saying of the Most High:“Avoid much [negative] assumption. Indeed, some assumption is sin.”[49:12] And also due to the saying of the Messenger, sallallahu `alayhi wa sallam,“Avoid suspicion, for airing suspicion is the most lying form of speech.”[Musnad Ahmad]