Making oaths in every casual conversation is not a good habit. Ordinary statements should usually be made without unnecessary swearing; when an oath is genuinely needed, it should be truthful and made by Allah.
Example 1: Avoid habitual oaths in minor buying and selling conversations.
Example 2: When someone routinely swears by a revered person or object, explain the proper etiquette and help correct the habit.
Example 3: A false oath used to obtain another person’s property adds a separate and serious injustice.
The compact structure مَنْ حَلَفَ ... فَقَدْ أَشْرَكَ joins the act to its warning with striking force.