Mahabharata 7.74.53

रथसागरमक्षोभ्यं मातङ्गाङ्गशिलाचितम्वेलाभूतस्तदा पार्थः पत्रिभिः समवारयत्

rathasāgaramakṣobhyaṃ mātaṅgāṅgaśilācitamvelābhūtastadā pārthaḥ patribhiḥ samavārayat

Our plain-language meaning of this verse is waiting for scholar review.