“And he [the elder] said to me: ‘These are the ones that come out of the great tribulation, and they have washed their robes and made them white in the blood of the Lamb.

Revelation 7:14b,

24. How do individuals of the great crowd qualify for survival?

²⁴ How do individuals of the great crowd qualify for survival? The elder tells John that they have “washed their robes and made them white in the blood of the Lamb.” In other words, they have exercised faith in Jesus as their Ransomer, have made a dedication to Jehovah, have symbolized their dedication by water baptism, and “hold a good conscience” by their upright conduct. (1 Peter 3:16, 21; Matthew 20:28) Thus, they are clean and righteous in Jehovah’s eyes. And they keep themselves “without spot from the world.”​—James 1:27.