nation has its appointed term ; when their term comes, neither can they delay it it nor can they advance it an hour (or a moment)"(A'raf,verse 34)

It did not express the same relatively small time duration in all positions. It is more ultimate as it also came to express the enormous panic of the Day of Judgment.

Allah The Almighty says " ... until of a sudden, the Hour (signs of death) is on them, and they say: ' Alas for us! We gave no thought to it'" (An'am , verse 31)