'Anger' in the Bible

Who knoweth? He doth turn back, and God hath repented, and hath turned back from the heat of His anger, and we do not perish.'

and he prayeth unto Jehovah, and he saith, 'I pray Thee, O Jehovah, is not this my word while I was in mine own land -- therefore I was beforehand to flee to Tarshish -- that I have known that Thou art a God, gracious and merciful, slow to anger, and abundant in kindness, and repenting of evil?