Acts 1:26
Then they cast lots, and the lot fell to Matthias; so he was added to the eleven apostles — casting lots (kleroi) invokes God's direct decision-making, paralleling OT priestly lots (Urim and Thummim). The restored twelve symbolizes that apostolic witness spans the twelve tribes of Israel; the church is reconstituted Israel. Matthias' addition marks the beginning of the apostolic college's public work and validates the community's discernment process under prayer.