لَا تَخُنْ مَنْ خَانَكَ shows that another person’s wrongdoing does not justify betrayal in return. Etiquette around greetings and entry protects privacy, and respect for labor becomes concrete through the delivery of what a worker is owed.
Example 1: Return a friend’s property even after a dispute.
Example 2: Greet the occupants of a home, seek entry permission, and respect their response.
Example 3: Pay the agreed amount when a worker has completed the work under the contract.
Good conduct includes fairness and honoring rights, not merely speaking in a pleasant tone.