What does the Bible say about the great multitude in Revelation 7?

In Revelation 7, the Apostle John sees a great multitude that no man can number, comprising people from every nation, tribe, and tongue. This multitude represents the redeemed who have come out of great tribulation and have their robes washed white in the blood of the Lamb. This imagery emphasizes the completeness and universality of God's salvation plan, fulfilling the promise made to Abraham that his descendants would be as numerous as the stars in the sky. Their presence before the throne underscores the faithfulness of God in bringing together His chosen people from all corners of the earth.