Translation of the verse 1 from Surah At-Takwir : Number of verses 29 - - page 586 - Part 30.
When the sun Kuwwirat (wound round and lost its light and is overthrown).
When the sun is wrapped up [in darkness]
(81:1) When the sun shall be folded up, *1
*1) This is a matchless metaphor for causing the sun to lose its light. Takwir means to fold up; hence takwir al- `amamah for folding up the turban on the head. Here, the light which radiates from the sun and spreads throughout the solar system has been likened to the turban and it has been said that on the Resurrection Day the turban will be folded up about the sun and its radiation will fade.
Source : At-Takwir Verse 1: When the sun is wrapped up [in darkness]