25 Then there came to be a dispute between John's disciples and a Jew about purification.
John 3:25 Cross References - CAB
Matthew 3:11
11 I indeed baptize you with water unto repentance, but He who is coming after me is mightier than I, whose sandals I am not worthy to carry. He will baptize you with the Holy Spirit,
Mark 7:2-5
2 Now when they saw some of His disciples eat bread with ceremonially unclean, that is, with unwashed hands, they found fault.
3 For the Pharisees and all the Jews do not eat unless they wash their hands with their fist, holding the tradition of the elders.
4 And coming from the marketplace, unless they bathe, they do not eat. And there are many other things which they have received by tradition, like the washing of cups and pitchers, copper vessels and couches.
5 Then the Pharisees and scribes asked Him, "Why do Your disciples not walk according to the tradition of the elders, but they eat bread with unwashed hands?"
Mark 7:8
8 "For having left the commandment of God, you hold to the tradition of men--the washing of pitchers and cups, and many other similar things you do."
John 2:6
6 Now there were six stone water jars standing there, according to the purification rites of the Jews, each holding two or three measures.
Hebrews 6:2
2 of the doctrine of baptisms, of laying on of hands, and of resurrection of the dead, and of eternal judgment.
Hebrews 9:10
10 concerned only with foods and drinks, various washings, and fleshly ordinances which are imposed until a time of reformation.
Hebrews 9:13-14
13 For if the blood of bulls and goats and the ashes of a heifer, sprinkling those having been defiled, sanctifies for the purity of the flesh,
14 by how much more shall the blood of Christ, who through the eternal Spirit offered Himself without spot to God, will cleanse your conscience from dead works in order that we might serve the living God?
Hebrews 9:23
23 Therefore it was necessary that the copies of the things in the heavens to be continually purified with these, but the heavenly things themselves by better sacrifices than these.
1 Peter 3:21
21 which as an antitype, baptism now also saves us-(not the putting away of the filth of the flesh, but an appeal to God for a good conscience), through the resurrection of Jesus Christ,