What does it mean that the tongue prevents the snake from hurting the wife?

Be careful with your tongue when you meet a snake. Calm down will kill your wife. Don't quarrel with others. When you see a snake, you have to endure the weather for a few days to avoid quarreling with others, which is a metaphor for not taking it out on others when something goes wrong. Hurting his wife means that he is injured, so he must be taken care of by his wife, which disrupts his wife's normal life. For example, if you vent unhappy things everywhere, you will encounter many negative situations, and your wife will have to bear the consequences together, which will make your wife's life difficult.