Nahum 3:7 (NASV)
7"And it will come about that all who see you Will shrink from you and say, 'Nineveh is devastated! Who will grieve for her?' Where will I seek comforters for you?"

The city of Nineveh had been spared when Jonah spoke to them of God’s judgment and they had repented from their sins. But the city had fallen back into its evil ways, repenting of their repentance. The city had once again become an enemy of God and Nahum was warning the people of its destruction. God had trouble getting Jonah to plead to the city, and now God was saying where will I find comforters for you when the city is devastated?

The great city of Nineveh had been given a chance by God to repent and begin a new life. Even though Jonah did not want to preach to Nineveh because of its great sin, God sent Jonah to preach about their imminent fall from grace. The people realized their sins and turned to God and were spared the destruction Jonah wanted to see fall on the people. Jonah knew how great their sin was and he did not want to see God’s grace given to them. And here they were once again, another prophet speaking to them as they were about to be destroyed. This time the people had hardened their hearts against God and this time they were not willing to repent. In verse 19 Nahum speaks for God and says, “There is no healing for your wound; your injury is fatal. All who hear of your destruction will clap their hands for joy. Where can anyone be found who has not suffered from your continual cruelty?” God desires to give grace. God desires to see everyone repent of their sins and follow him. But God will not be mocked by those who receive His grace and then abuse it. Remember the words of the great hymn below:

Marvelous grace of our loving Lord,
Grace that exceeds our sin and our guilt,
Yonder on Calvary's mount outpoured,
There where the blood of the Lamb was spilt.

Grace, grace, God's grace,
Grace that will pardon and cleanse within;
Grace, grace, God's grace,
Grace that is greater than all my sin.

Sin and despair like the sea waves cold,
Threaten the soul with infinite loss;
Grace that is greater, yes, grace untold,
Points to the refuge, the mighty cross.

Dark is the stain that we cannot hide,
What can avail to wash it away?
Look! there is flowing a crimson tide;
Whiter than snow you may be today.