Verse 4

इमास्ता मृतमातङ्गदन्तमाला वृतौ कृताः ।अद्यापि संस्थिताः कल्पं प्रतिमेरुशिखा इव

In plain words

These are those very garlands of dead elephants' tusks, made into a fence -- even now they stand, as for a whole kalpa, like peaks rivalling Meru.