Jonah 3:10

10 When God saw what they did and how they turned from their evil ways, he relented and did not bring on them the destruction he had threatened.

Read Jonah 3:10 Using Other Translations

And God saw their works, that they turned from their evil way; and God repented of the evil, that he had said that he would do unto them; and he did it not.
When God saw what they did, how they turned from their evil way, God relented of the disaster that he had said he would do to them, and he did not do it.
When God saw what they had done and how they had put a stop to their evil ways, he changed his mind and did not carry out the destruction he had threatened.