13-41
Or do they not see that We certainly give the earth its reduction from its borders {3}. And (when) Allah commands none can reverse His command and He is Quick at (settling) the account.
This may refer to the contraction of the earth’s crust while cooling from a very hot molten state to the present condition and beyond. Even today the major portion of the earth’s interior is hot and in a molten state.
Contraction of the Earth:
This may refer to the contraction of the earth’s crust while cooling from a very hot molten state to the present condition. Even today the major portion of the earth’s interior is hot and in a molten state.
13-42
And those before them did indeed plan, but the planning is wholly Allah’s (consequently) He knows what every soul earns. And the infidels will come to know, for whom is the final (good) home.
Allah (SWT) knows the plans of everyone because the whole planning is His, He has already recorded all events 13:39.
13-43
And those who do not believe say, “”You are not a messenger.”” Say, “”Allah is sufficient as a Witness between me and you along with him with whom is the knowledge of the book.”” (R 6)
Muhammed (PBH) does not need a certificate for his messenger ship from the infidels, Allah (SWT) and those who possess correct knowledge of Divine books are sufficient as witness.