jax8686, if you can argue extra-Biblically, here’s some sites saying what they did during the first years of the Church.
search.yahoo.com/search?p=Infant+Baptism&fr=FP-tab-web-t&toggle=1&ei=UTF-8 – This one is from a Greek Orthodox author…I HIGHLY RECOMEND IT!!
However, from that book I was trying to help with in that other thread, Where is That in the Bible? Chapter 21. “INFANT BAPTISM”
To explain the Church’s ancient practice of infant baptism, begin the discussion by showing the necessity and effects of baptism (see above).* Show that in the Old TEstament God instituted the ordinance of circumcision as the normative way for bringing a male child into the Covenant (cf. Gen. 17:1-14), and this ritual was symbolic of the stripping away of hardheartedness and obstinancy and the entering into God’s covenant of love with his people (cf. Deut, 10:12-22; 30:1-10). It was through circumcision that a child was brough into the Covenant.
Then move to Christ’s comments about bringing the children to him. We “lead children to Christ” preeminently through the waters of baptism. In Matthew’s Gospel, the Greek word used for children is *paidía, *a generic word that doesn’t denote any particular age. In Luke’s Gospel, however, we see, in adition to *paidía, another Greek word for children: br[font=‘Times New Roman’]éphe, *which means “infants,” children who are too young to walk and therefore were unable to “come to Christ” under their own power. THese infants, Luke tells us, were being brough to Christ by adults, most likely their parents so that Christ “might touch them.” In the sacrament of baptism, Christ touches the sound with his grace and life. Scripture tells us that baptism in the New Covenant replaces circumcision in the Old (cf. Col. 2:11-15). So, in the same way that Jewish parents, prior to the time of Christ, woudl covenant with God on behalf of their eight-day old son through the ordinance of circumcision, Christian parents also covenant with God on behalf of their children, through the sacrement of baptism.[/font]
The fact that God bestows blessings or forgiveness or healing on one person because of the faith and spiritual diligence of another person is shown rpeatedly in Scripture. Some examples of this are found in Genesis 18:16-33 (where Abraham intercedes with God on behalf of the city of Dodom), Matthew 8:5-13 (where the centurion’s servant is healed because of the centurion’s faith in Christ [cf. Luke 7:1-20]), Matthew 15:21-28 (where the Canaanite woman’s daughter was healed because of the mother’s appeal to Christ on behalf of her daugher), and perhaps most strikingly in Luke 5:17-26.
*I’m guessing they mean ch 20, here.