Biblical Reference:
The event of the Third Bowl is described in the Book of Revelation, specifically in Revelation 16:4-7. This passage is part of the larger narrative concerning the Seven Bowls of God's Wrath, which are poured out upon the earth as a divine judgment during the end times.

Scriptural Account (Berean Standard Bible):
Revelation 16:4-7 states:
"Then the third angel poured out his bowl into the rivers and springs of water, and they became blood. And I heard the angel of the waters say: 'Righteous are You, O Holy One, who is and was, because You have brought these judgments. For they have spilled the blood of saints and prophets, and You have given them blood to drink as they deserve.' And I heard the altar reply: 'Yes, Lord God Almighty, true and just are Your judgments.'"

Context and Interpretation:
The Third Bowl is part of a series of judgments that God unleashes upon the earth, as described in the apocalyptic vision given to the Apostle John. These judgments are a response to the persistent rebellion and sinfulness of humanity, particularly those who have rejected God and persecuted His people.

The transformation of rivers and springs into blood is reminiscent of the first plague in Egypt (Exodus 7:17-21), where the Nile River was turned to blood as a sign of God's power and judgment against Pharaoh. In Revelation, this act serves as a divine retribution for the bloodshed of God's faithful servants, the saints, and prophets. The imagery of blood signifies both the severity of God's judgment and the justice of His actions.

Theological Significance:
The declaration by the angel of the waters underscores the righteousness and holiness of God in executing these judgments. The angel acknowledges that the punishment fits the crime, as those who have shed the blood of the innocent are now given blood to drink. This reflects the biblical principle of divine justice, where God repays each according to their deeds (Romans 2:6).

The response from the altar, affirming the truth and justice of God's judgments, may symbolize the collective voice of the martyrs and the heavenly host, who recognize and affirm God's sovereign rule and righteous character. This serves as a reminder to believers of the ultimate vindication and justice that God will bring about for His people.

Symbolism and Imagery:
The imagery of blood in this passage is potent and multifaceted. It serves as a symbol of life, death, and judgment. The transformation of life-giving water into blood highlights the reversal of creation's order due to sin and rebellion. It also serves as a stark reminder of the consequences of rejecting God's grace and mercy.

Application for Believers:
For Christians, the account of the Third Bowl serves as a sobering reminder of the reality of God's judgment and the importance of remaining faithful amidst persecution and trials. It calls believers to trust in God's justice and to persevere in righteousness, knowing that God will ultimately vindicate His people and establish His kingdom in truth and justice.