O God, who dost bring into the way of truth them that are gone astray, dost gather together them that are scattered abroad, and preserve them that thou hast gathered; we beseech thee, of thy mercy to pour out upon all Christian people thy grace of unity and concord, that, all divisions being done away, they may be one flock, in one fold, under one Shepherd, and do thee worthy service. Through the same Jesus Christ thy Son our Lord, who liveth and reigneth with thee and the Holy Spirit, one God, world without end. Amen.
-from the Anglican Missal
Mass for the Ending of Schism.