Jonah 3: 1-3 Then the word of the Lord came to Jonah, a second time. Go to the great City of Nineveh and proclaim to it the message I give you. Jonah obeyed the word of the Lord and went to Nineveh. Now Niniveh was a large City; it took three days to go through it.
We all know that Nineveh, one of the great cities of the Assyrians, has fallen under the judgement of God because of their wickedness. Jonah the first time ran away from God but came back after being in the belly of the fish God appointed to swallow him up for 3 days.
God is a God of second chance. Here we see the graciousness and patience of God with us sinners. God knows what is best for us. When we struggle with having His heart for all people, his heart helps us find our way back.