'Three' in the Bible

Then Moses set apart three cities across the Jordan to the east.

“At the end of every three years, bring a tenth of all your produce for that year and store it within your gates.

“All your males are to appear three times a year before the Lord your God in the place He chooses: at the Festival of Unleavened Bread, the Festival of Weeks, and the Festival of Booths. No one is to appear before the Lord empty-handed.

The one condemned to die is to be executed on the testimony of two or three witnesses. No one is to be executed on the testimony of a single witness.

you are to set apart three cities for yourselves within the land the Lord your God is giving you to possess.

You are to determine the distances and divide the land the Lord your God is granting you as an inheritance into three regions, so that anyone who commits manslaughter can flee to these cities.

This is why I am commanding you to set apart three cities for yourselves.

provided you keep every one of these commands I am giving you today and follow them, loving the Lord your God and walking in His ways at all times—you are to add three more cities to these three.

“One witness cannot establish any wrongdoing or sin against a person, whatever that person has done. A fact must be established by the testimony of two or three witnesses.