'Anger' in the Bible

Who knows whether God will not turn and relent, and turn away from his fierce anger, so that we might not perish?"

He prayed to Yahweh, and said, "Please, Yahweh, wasn't this what I said when I was still in my own country? Therefore I hurried to flee to Tarshish, for I knew that you are a gracious God, and merciful, slow to anger, and abundant in loving kindness, and you relent of doing harm.