The first man blurted out to the Mu'adhdhin, "Are you calling to the prayer? Is it the right time?" The second spoke on the spur of the moment, "You have wasted your salah by speaking during prayers." The third retorted, "Why did YOU speak? Tell yourself how to behave!" The fourth mumbled, "Praise be to Allah! I wasn't a party to their arguments."

Thus all the four broke their solat and wasted it. The fault-finders went more astray than the one who made the orginal mistake.

Moral of the story: Correct oneself before correcting others!