Targum zu Bereschit 36:39

And Baal Hanan bar Akbor died, and instead of him reigned Hadar; and the name of the city of the house of his kingdom was Pahu; and the name of his wife was Mehetabel the daughter of Matred. He was the man who laboured with perseverance and vigilance, and who, after he had become wealthy and had gotten riches, turned to become more lofty in his heart, saying What is silver and what is gold?

And after him reigned Hadar; and the name of his city was Pahu, andthe daughter of Matred, the daughter of the changer of gold: the man who perseverance all the days of his life; but who, after he had eaten and was satisfied, converted and said, What is gold, and what is silver?