Bereishit Rabbah 58.13
Terah was an idol manufacturer who once went away and left Abraham in charge of the store. A man walked in and wished to buy an idol. Abraham asked him how old he was and the man responded “50 years old.” Abraham then said, “You are 50 years old and would worship a day old statue!” At this point the man left, ashamed.
Later, a woman walked into the store and wanted to make an offering to the idols. So Abraham took a stick, smashed the idols and placed the stick in the hand of the largest idol. When Terah returned, he asked Abraham what happened to all the idols. Abraham told him that a woman came in to make an offering to the idols. The idols argued about which one should eat the offering first, then the largest idol took the stick and smashed all the other idols. Terah responded by saying that they are only statues and have no knowledge. Whereupon Abraham responded by saying that you deny their knowledge, yet you worship them! At this point, Terah took Abraham to Nimrod.
Nimrod proclaims to Abraham that we should worship fire. Abraham responds that water puts out fire. So Nimrod declares they worship water. Abraham responds that clouds hold water. So Nimrod declares they worship clouds. Abraham responds that wind pushes clouds. So Nimrod declares they worship wind. Abraham responds that people withstand wind.
Nimrod becomes angry with Abraham and declares that Abraham shall be cast into the fire, and if Abraham is correct, i.e. that there is a real God, then that God will save him. Abraham is cast into the fire and is saved by God.
Abraham’s brother Haran sees what happened and says that he believes in the God of Abraham. Haran is thrown into the fire, and is not saved by God. Hence the verse in Genesis 11:28, “And Haran died in the presence of his father Terah in the land of his nativity, in Ur of the Chaldees.”