The Baptist Catechism

Q.99: Are the infants of such as are professing believers to be baptized?

A. The infants of such as are professing believers are not to be baptized, because there is neither command or example in the Holy Scriptures, or certain consequence from them to baptize such.

Do not add to His words, lest He rebuke you, and you be found a liar.       Proverbs 30:6

Then Nadab and Abihu, the sons of Aaron, each took his censer and put fire in it, put incense on it, and offered profane fire before the LORD, which He had not commanded them. So fire went out from the LORD and devoured them, and they died before the LORD.        Leviticus 10:1-2