Letter (20) is a powerful message from Imam Ali (a.s.) addressed to Ziyad Ibn Abiyya. This letter was written during the time when Abdullah Ibn Abbas was the ruler of Basra, and Ziyad was his deputy. The main purpose of this letter is to safeguard the financial rights of Muslims, and Imam Ali (a.s.) clearly states that if Ziyad commits any deceit regarding the wealth of Muslims, he will face severe consequences.

In this letter, Imam Ali (a.s.) swears by Allah, which emphasizes the seriousness and importance of the message. This is a way for Imam Ali (a.s.) to warn Ziyad to reflect on the outcomes of his actions. He states that if he learns of any manipulation of Muslims' wealth, he will punish Ziyad in such a manner that he will be left in a dire state.

This letter teaches us that honesty and integrity are crucial in leadership responsibilities. It also reminds us that a sense of accountability before Allah should be present in everyone, especially those in public office.

An important aspect of this letter is that Imam Ali (a.s.) uses his authority solely for the sake of justice. He clarifies that he will not tolerate oppression and deceit. This serves as an example of how a leader should protect the rights of their people.

Practically, this letter conveys the lesson that we should remain honest in our dealings, especially when in positions of power. We must always be mindful of the consequences of our actions and respect the rights of others.