Leitourgia (G3009) is the origin of the English word 'liturgy.' In the ancient world it meant public service performed at one's own expense for the community. In the New Testament it carries rich priestly overtones โ the formal service of worship, the ministry of apostles and priests, the sacrifice of one's life in service to God and others.
Paul uses leitourgia for the Gentile church's financial contribution to Jerusalem saints (2 Corinthians 9:12) โ reframing generosity as priestly service. Philippians 2:17 depicts Paul's ministry as a priestly offering. Hebrews uses it for Christ's high-priestly ministry in the heavenly sanctuary. Every believer participates in this royal priesthood of leitourgia.