'Twelve' in the Bible

So the twelve summoned the community of disciples [and] said, "It is not desirable [that] we neglect the word of God to serve tables.

And he gave him the covenant of circumcision, and so he became the father of Isaac and circumcised him on the eighth day, and Isaac [did so with] Jacob, and Jacob [did so with] the twelve patriarchs.

(Now the total [number] [of] men was about twelve.)

You can ascertain that {it has not been more than} twelve days {since} I went up to Jerusalem to worship.

to which our twelve tribes hope to attain as [they] earnestly serve [him] night and day. Concerning this hope I am being accused by the Jews, O king!