وَأَخْرَجَتِ الْأَرْضُ أَثْقَالَهَا
And the earth brings out its burdens. (99:2)
The first verse concentrates on the earth’s shaking; the second explicitly repeats al-arḍu and adds a fresh predicate, akhrajat. Repeating the noun keeps the same subject in focus while marking a distinct stage. Athqālahā portrays the bringing forth of what had been contained within.
This repetition is not empty redundancy. It allows two independent but connected events to unfold in a sequence. Nor should every repeated noun be called tadhyīl: this clause does not merely generalize the previous assertion, but advances the event.