'Three' in the Bible

Then Moses set apart three cities {on the other side of the Jordan}, {toward the east},

"At the end of three years you shall bring out all [of] the tithe of your yield for that year, and you shall store [it] in your {towns}.

Three times in the year all [of] your males shall appear {before } Yahweh your God at the place that he will choose, at the Feast of Unleavened Bread and at the Feast of Weeks and at the Feast of Booths, and they shall not appear {before Yahweh} empty-handed.

{On the evidence of} two or three witnesses {the person shall be put to death}. The person shall not be put to death by the mouth of one witness.

you shall set apart three cities for you in the midst of your land that Yahweh your God [is] giving to you to take possession of it.

Therefore I [am] commanding you, {saying}, 'You shall set apart three cities.'

[then] {if you diligently observe this entire commandment} that I [am] commanding you {today} by loving Yahweh your God and by going in his ways {at all times}, then you shall add three more cities for yourselves to these three.

{The testimony of a single witness may not be used to convict} [with respect to] any crime and for any wrongdoing in any offense that a person committed; on the {evidence} of two witnesses or on the {evidence} of three witnesses {a charge shall be sustained}.