'Purpose' in the Bible

Who may say that God will not be turned, changing his purpose and turning away from his burning wrath, so that destruction may not overtake us?

And God saw what they did, how they were turned from their evil way; and God's purpose was changed as to the evil which he said he would do to them, and he did it not.

And he made prayer to the Lord and said, O Lord, is this not what I said when I was still in my country? This is why I took care to go in flight to Tarshish: for I was certain that you were a loving God, full of pity, slow to be angry and great in mercy, and ready to be turned from your purpose of evil.