1 Kings 12:30
King James Version
“And this thing became a sin: for the people went before the one, unto Dan.”
Context
27If this people go up to do sacrifice in the house of the LORD at Jerusalem, then shall the heart of this people turn again unto their lord, unto Rehoboam king of Judah, and they shall kill me, and go again to Rehoboam king of Judah.
28Whereupon the king took counsel, and made two calves gold, and said unto them, It is too much for you to go up to Jerusalem: behold thy gods, O Israel, which brought thee up out of the land of Egypt.
29And he set the one in Bethel, and the other put he in Dan.
30And this thing became a sin: for the people went before the one, unto Dan.
31And he made an house of high places, and made priests of the lowest of the people, which were not of the sons of Levi.
32And Jeroboam ordained a feast in the eighth month, on the fifteenth day of the month, like unto the feast that in Judah, and he offered upon the altar. So did he in Bethel, sacrificing unto the calves that he had made: and he placed in Bethel the priests of the high places which he had made.
33So he offered upon the altar which he had made in Bethel the fifteenth day of the eighth month, in the month which he had devised of his own heart; and ordained a feast unto the children of Israel: and he offered upon the altar, and burnt incense.