This note applies to several related themes regarding baptism and the household.
Physical water baptism doesn’t save:
Eze 36:25-27
Lk 23:39-43 (the thief wasn't baptized).
Acts 8:16; 10:44-48; 11:15-16
Tit 3:5
1 Pe 3:21
Baptism has to do with spiritual cleansing:
1 Cor 12:13
Heb 10:19-22
Household Principle (God deals with families -- and this applies to Baptism as it did circumcision):
Gen 9:9; 18:19; 19:12
Ex 12:3, 21, 24
Deut 29:29
2 Chr 17:3
Jer 3:14