And as they continued to ask him, he stood up and said to them, “Let him who is without sin among you be the first to throw a stone at her.” [John 8:7]
Jesus was teaching when the scribes and Pharisees interrupted him. They brought to Him a woman who was caught for committing adultery, and asked Him if the woman should be stoned according to the Law of Moses. He did not give them a direct yes or no. He told them to let the one without sin to cast the first stone. They felt guilty and left.
Sometimes, we behave like the scribes and Pharisees in this story, being quick to judge others of their sins and behaving as though we are sinless. This should not be so. A sinner is in no position to judge another sinner, especially if he is guilty of the same sin.
Going by what Jesus said, then He should be the most qualified to throw the first stone. But He did not do so. He let the woman go, and told her to sin no more. He showed her mercy. It should not be mistaken that He condoned the sin; rather He was giving her a chance to repent.