'Custom' in the Bible

So the servants served Joseph by himself [in honor of his rank], and his brothers by themselves, and the Egyptians who ate with him by themselves, because [according to custom] the Egyptians could not eat food with the Hebrews, for that is loathsome to the Egyptians.

When they came to the threshing floor of Atad, which is beyond the Jordan, they mourned there with a great lamentation (expressions of mourning for the deceased) and [extreme demonstrations of] sorrow [according to Egyptian custom]; and Joseph observed a seven-day mourning for his father.

At the end of two months she returned to her father, who did to her as he had vowed; and she had no relations with a man. It became a custom in Israel,

Now formerly in Israel this was the custom concerning redeeming and exchanging property. To confirm a transaction, a man pulled off his sandal and gave it to the other. This was the way of confirming and attesting in Israel.

and the custom of the priests with [the sacrifices of] the people. When any man was offering a sacrifice, the priest’s servant would come while the meat was boiling, with a three-pronged [meat] fork in his hand;

So they cried out with a loud voice [to get Baal’s attention] and cut themselves with swords and lances in accordance with their custom, until the blood flowed out on them.

To this day they act in accordance with their former [pagan] customs: they do not [really] fear the Lord, nor do they obey their statutes and ordinances, nor the law, nor the commandments which the Lord commanded the sons (descendants) of Jacob, whom He named Israel;

Now let it be known to the king, that if that city is rebuilt and the walls are finished, then they will not pay tax, custom, or toll, and the revenue of the kings will be diminished.

There have also been mighty kings over Jerusalem who have ruled over all the provinces west of the [Euphrates] River, and tax, custom, and toll were paid to them.

We also inform you that it is not authorized to impose tax, tribute, or toll on any of the priests, Levites, singers, doorkeepers, temple servants or other servants of this house of God.

“The command which Jonadab the son of Rechab gave to his sons not to drink wine has been observed [as a custom for more than two hundred years]. To this day they do not drink wine, for they have obeyed their father’s command. But I have repeatedly spoken to you, yet you have not listened to Me.