وَجَلَا السُّيُولُ عَنِ الطُّلُولِ كَأَنَّهَا ۞ زُبُرٌ تُجِدُّ مُتُونَهَا أَقْلَامُهَا
Floodwater cleared the old camp-mounds, revealing traces like lines of writing whose surfaces are being freshly marked by pens.
Jalā al-suyūl means that floods have washed away covering earth and made traces visible. Zubur evokes written pages or inscriptions; in tujiddu mutūnahā aqlāmuhā, pens renew the written surfaces. Earlier the traces were fading; now flooding makes them readable again. This reversal is central to the image.