A collection is an organized gathering of money or goods for a stated purpose. In the New Testament, the term especially refers to Paul’s planned contribution from Gentile churches for poor Christians in Jerusalem.
Paul urged systematic contributions, arranged for delegates to carry them to Jerusalem, and regarded the ministry as important fellowship between Gentile believers and the needy church there. In the Old Testament the term can refer to a prescribed tax.
The Jerusalem church was especially needy, and the collection was gathered across Galatia, Asia, Macedonia, and Achaia. Paul planned it in advance and intended to accompany those carrying it despite dangers.