Virtue: The Messenger (S.A.W) warned us against shirk, fearing that his Ummah might fall into it, and said “The thing I fear most for you is minor shirk.”
The Messenger (S.A.W) also said: “Shirk among you is more subtle than the sound of the footsteps of an ant on a rock. Shall I not tell you of something which, if you do it, it will take that away from you both minor and major forms of it” (Saying this Du’a).
Reference: Narrated by Ahmad #23119