1 Kings 12:25-33

25 Then Jeroboam made the town of Shechem in the hill-country of Ephraim a strong place, and was living there; and from there he went out and did the same to Penuel.
26 And Jeroboam said in his heart, Now the kingdom will go back to the family of David:
27 If the people go up to make offerings in the house of the Lord at Jerusalem, their heart will be turned again to their lord, to Rehoboam, king of Judah; and they will put me to death and go back to Rehoboam, king of Judah.
28 So after taking thought the king made two oxen of gold; and he said to the people, You have been going up to Jerusalem long enough; see! these are your gods, O Israel, who took you out of the land of Egypt.
29 And he put one in Beth-el and the other in Dan.
30 And this became a sin in Israel; for the people went to give worship to the one at Beth-el, and to the other at Dan.
31 And he made places for worship at the high places, and made priests, who were not Levites, from among all the people.
32 And Jeroboam gave orders for a feast in the eighth month, on the fifteenth day of the month, like the feast which is kept in Judah, and he went up to the altar. And in the same way, in Beth-el, he gave offerings to the oxen which he had made, placing in Beth-el the priests of the high places he had made.
33 He went up to the altar he had made in Beth-el on the fifteenth day of the eighth month, the month fixed by him at his pleasure; and he gave orders for a feast for the people of Israel, and went up to the altar, and there he made the smoke of his offerings go up.