Terah had to be reincarnated to correct his and his father's mistakes. He came back as Job. The hint to this in the Torah is "God appeared to Abraham in the Valley," in Hebrew, "Vayera elav Adonai Be'elonei." The first letters form Job (Iyov.)
The last words of the book of Job, "Therefore, I renounce my words and relent, for I am but dust and ashes." He means, "I relent because of that one who called himself dust and ashes – Abraham."
Abraham was told that his father already started his reincarnation. "Abraham was told that Milcah has given birth to Uz," and Uz is another name for Job, who was from the land of Uz.
Art: Job by William Blake