Before the Cross, when Jesus was talking to those Jews, He was explaining that when you "walk in the world" you get dirty.
That is symbolic, so, HE washes the part that get's dirty.
That's symbolic.
So, He's showing us that He is the Washer, He is the Cleanser, He is the Word, He is the WAY to be made clean.
Ephesians 5:26
to make her holy, cleansing her by the washing with water through the word,
New Living Translation
to make her holy and clean, washed by the cleansing of God’s word.
English Standard Version
that he might sanctify her, having cleansed her by the washing of water with the word,
Berean Standard Bible
to sanctify her, cleansing her by the washing with water through the word,
Berean Literal Bible
so that He might sanctify her, having cleansed
her by the washing of water by
the word,
King James Bible
That he might sanctify and cleanse it with the washing of water by the word,
New King James Version
that He might sanctify and cleanse her with the washing of water by the word,
That's the Cross of Christ.
That's the Blood of Jesus.
Notice that Jesus said............."You must be born again"... and that is not about washing your body. That is about the Blood of Jesus making your sin, as white as snow.
Washing your feet wont get you into heaven.
But being washed in the Blood of The Lamb will remove the SIN, that is stopping you from being joined to God.