xxiv, 29-30.
In the Qur'an we read:-- When the sun shall be shrouded, And when the stars shall fall, And when the mountains are made to pass away ...
And when the leaves of the Book shall be unrolled, And when the heaven shall be uncovered, And when hell shall be made to blaze .-- Sura lxxxi.
In the Book of Iqan Baha'u'llah explains that these prophecies about the sun, moon and stars, the heavens and the earth, are symbolical and are not to be understood merely in the literal sense.

The Prophets were primarily concerned with spiritual, not material, things; with spiritual, not with physical, light.

When They mention the sun, in connection with the Day of Judgment, They refer to the Sun of Righteousness.

The sun is the supreme source of light, so Moses was a sun for the Hebrews, Christ for the Christians, and Muhammad for the Muslims.

When the Prophets speak of the sun being darkened, what is meant is that the pure teachings of these spiritual Suns have become obscured by misrepresentation, misunderstanding and prejudice, so that the people are in spiritual darkness.