62 Another Victor of Assuras said: "It is written, that 'there is one God and one Christ, one Church and one baptism.' How then can any one baptize in a place where there is not either God, or Christ, or the Church?"
63. How can any one baptize either in that sand, where the Church is not, seeing that it is on the rock; nor God and Christ, seeing that there is not there the temple of God and Christ?
Source: On Baptism, Against the Donatists (New Advent)