Urijah the priest built an altar: according to all that king Ahaz had sent from Damascus, so did Urijah the priest make it against the coming of king Ahaz from Damascus.

Because Ephraim has multiplied altars for sinning, they became for him altars for sinning.

Made proclamation

"Speak to the children of Israel, and tell them, 'The set feasts of Yahweh, which you shall proclaim to be holy convocations, even these are my set feasts.

She wrote in the letters, saying, "Proclaim a fast, and set Naboth on high among the people.

Jehu said, "Sanctify a solemn assembly for Baal!" They proclaimed it.

So they established a decree to make proclamation throughout all Israel, from Beersheba even to Dan, that they should come to keep the Passover to Yahweh, the God of Israel, at Jerusalem: for they had not kept it in great numbers in such sort as it is written.

A feast

He received what they handed him, and fashioned it with an engraving tool, and made it a molten calf; and they said, "These are your gods, Israel, which brought you up out of the land of Egypt."

Moses said, "We will go with our young and with our old; with our sons and with our daughters, with our flocks and with our herds will we go; for we must hold a feast to Yahweh."

This day shall be to you for a memorial, and you shall keep it a feast to Yahweh: throughout your generations you shall keep it a feast by an ordinance forever.

Jeroboam ordained a feast in the eighth month, on the fifteenth day of the month, like the feast that is in Judah, and he went up to the altar; so did he in Bethel, sacrificing to the calves that he had made: and he placed in Bethel the priests of the high places that he had made.

Therefore let us keep the feast, not with old yeast, neither with the yeast of malice and wickedness, but with the unleavened bread of sincerity and truth.

General references

Yahweh was very angry with Aaron to destroy him: and I prayed for Aaron also at the same time.

Yes, when they had made them a molten calf, and said, 'This is your God who brought you up out of Egypt,' and had committed awful blasphemies;

They made a calf in Horeb, and worshiped a molten image.