'Custom' in the Bible

She looked and behold, the king was standing by the pillar, according to the custom, with the captains and the trumpeters beside the king; and all the people of the land rejoiced and blew trumpets. Then Athaliah tore her clothes and cried, “Treason! Treason!”

So they spoke to the king of Assyria, saying, “The nations whom you have carried away into exile in the cities of Samaria do not know the custom of the god of the land; so he has sent lions among them, and behold, they kill them because they do not know the custom of the god of the land.”

Then the king of Assyria commanded, saying, “Take there one of the priests whom you carried away into exile and let him go and live there; and let him teach them the custom of the god of the land.”

They feared the Lord and served their own gods according to the custom of the nations from among whom they had been carried away into exile.

However, they did not listen, but they did according to their earlier custom.