From the first letter of Peter:
But even if you do suffer for doing what is right, you are blessed. Do not fear what they fear, and do not be intimidated, but in your hearts sanctify Christ as Lord. Always be ready to make your defence to anyone who demands from you an account of the hope that is in you; yet do it with gentleness and reverence. Keep your conscience clear, so that, when you are maligned, those who abuse you for your good conduct in Christ may be put to shame. For it is better to suffer for doing good, if suffering should be God’s will, than to suffer for doing evil. For Christ also suffered for sins once for all, the righteous for the unrighteous, in order to bring you to God. He was put to death in the flesh, but made alive in the spirit, in which also he went and made a proclamation to the spirits in prison, who in former times did not obey, when God waited patiently in the days of Noah, during the building of the ark, in which a few, that is, eight people, were saved through water. And baptism, which this prefigured, now saves you—not as a removal of dirt from the body, but as an appeal to God for a good conscience, through the resurrection of Jesus Christ, who has gone into heaven and is at the right hand of God, with angels, authorities, and powers made subject to him.(1 Peter 3:14-22)
And from the letter to the Colossians (whose authorship is disputed, but may be Paul himself; I am no scripture scholar, but it is a great passage):
See to it that no one takes you captive through philosophy and empty deceit, according to human tradition, according to the elemental spirits of the universe, and not according to Christ. For in him the whole fullness of deity dwells bodily, and you have come to fullness in him, who is the head of every ruler and authority. In him also you were circumcised with a spiritual circumcision, by putting off the body of the flesh in the circumcision of Christ; when you were buried with him in baptism, you were also raised with him through faith in the power of God, who raised him from the dead. And when you were dead in trespasses and the uncircumcision of your flesh, God made you alive together with him, when he forgave us all our trespasses, erasing the record that stood against us with its legal demands. He set this aside, nailing it to the cross. He disarmed the rulers and authorities and made a public example of them, triumphing over them in it.
Therefore do not let anyone condemn you in matters of food and drink or of observing festivals, new moons, or sabbaths. These are only a shadow of what is to come, but the substance belongs to Christ.(Colossians 2:8-17)
Happy feast day.
Edit: I almost forgot to mention that I found the first of these through an interesting (though poorly formatted) online essay on the Fathers' writings on baptism. Here it is.