The absence of a scriptural command to prohibit administering the sign of the covenant to children after two thousand years of such practice weighs significantly against the view that the apostles wanted only those who were able to profess their faith to be baptized.
Actually, one doesn't need a command to the contrary if a clear, concise command is already given. For example, if I instruct a person cleaning my car to wash my windows with soap and water, I am not obligated to command not washing my windows with Windex, bleach, or vinegar. If someone washes my windows with anything other than soap and water, he or she has violated my clear, concise command.
