Baptism is an ordinance of the New Testament, given by Christ, to be dispensed only upon persons professing faith. The way and manner of dispensing this Ordinance the Scripture holds to be dipping the whole body under water. Is a sign as follows: first, the washing of the whole soul in the blood of Christ; second, the interest that the Saints have in the death, burial and resurrection; third, a confirmation of our faith that as certainly as the body is buried under water and rises again, so certainly shall the bodies of the Saints be raised by the power of Christ, in the day of resurrection, to reign with Christ. (The London Confession - 1644)

Infant Baptism:
A Part and Pillar of Popery
by John Gill

Baptism
by A.T. Robertson

Baptismal Regeneration
by C.H. Spurgeon