How do we know that God is merciful in the story of Jonah?

The mercy of God is evident throughout the narrative of Jonah, particularly at the climax of the story when the people of Nineveh repent in response to Jonah's warning. After Jonah reluctantly delivers God's message of impending judgment, the king and the people declare a fast and don sackcloth in an act of repentance. In Jonah 3:10, we see that God saw their works and turned away from the disaster He had planned for them. This moment exemplifies God's willingness to show mercy rather than exercise judgment when individuals turn from their wicked ways and seek Him. It underscores the core message that God's heart is toward forgiveness, showcasing that despite our shortcomings, His grace is sufficient for our salvation.