Outward sign of an inward grace.
John 7:38 Whoever believes in me, as the Scripture has said, streams of living water will flow from within him."
John 4:14 but whoever drinks the water I give him will never thirst. Indeed, the water I give him will become in him a spring of water welling up to eternal life."
It has the same connotation as the Eucharist:
John 6 :53 Jesus said to them, “I tell you the truth, unless you eat the flesh of the Son of Man and drink his blood, you have no life in you. 54 Whoever eats my flesh and drinks my blood has eternal life, and I will raise him up at the last day. 55 For my flesh is real food and my blood is real drink. 56 Whoever eats my flesh and drinks my blood remains in me, and I in him. 57 Just as the living Father sent me and I live because of the Father, so the one who feeds on me will live because of me.
John 13:8 "No," said Peter, "you shall never wash my feet." Jesus answered, "Unless I wash you, you have no part with me."
Ephesians 5:25-27 NET Husbands, love your wives just as Christ loved the church and gave himself for her to sanctify her by cleansing her with the washing of the water by the word, so that he may present the church to himself as glorious – not having a stain or wrinkle, or any such blemish, but holy and blameless.
In Scripture, words like water, bread, wine, chicks, children means interpretation of Scripture. Israel was given Scripture, the vineyard, and expected to ”harvest” life giving wine from it:
Matthew 21:33-35 NET “Listen to another parable: There was a landowner who planted a vineyard. He put a fence around it, dug a pit for its winepress, and built a watchtower. Then he leased it to tenant farmers and went on a journey. When the harvest time was near, he sent his slaves to the tenants to collect his portion of the crop. But the tenants seized his slaves, beat one, killed another, and stoned another.
Man shall not live by (physical) bread alone? This parable was told right after the Pharisees were informed that prostitutes and tax collectors would enter the kingdom of God before they themselves would.
Its parallel is here:
Matthew 23:37 NET“O Jerusalem, Jerusalem, you who kill the prophets and stone those who are sent to you! How often I have longed to gather your children together as a hen gathers her chicks under her wings, but you would have none of it!
Bread and wine is the Word of God, metonym for Message, which is the meaning, revelation, interpretation of Scripture:
John 5:39 NET You study the scriptures thoroughly because you think in them you possess eternal life, and it is these same scriptures that testify about me,
1 Corinthians 10:4 NET and all drank the same spiritual drink. For they were all drinking from the spiritual rock that followed them, and the rock was Christ.