'Custom' in the Bible

Later, after the two months were concluded, she returned to her father, and he fulfilled what he had solemnly vowed and she never married. That's how the custom arose in Israel

The custom of the priests with the people was that whenever a person offered a sacrifice, a servant of the priest would come with a three pronged fork in his hand while the meat was boiling, and

So the prophets of Baal cried even louder and slashed themselves with swords and lances until their blood gushed out all over them, as was their custom.

She looked around and there was the king, standing near a column, as was the royal custom! He was accompanied by the commanding officers, along with trumpeters who stood beside the king. All the people of the land sounded trumpets in their excitement. But Athaliah tore her clothes and bellowed, "It's a plot! A conspiracy!"

While they continued to fear the LORD, they served their own gods, following the custom of the nations whom they had carried away from there.

Then the king flew into a rage. The king spoke to the wise men who understood the times, for it was the king's custom to consult all those who understood law and justice.