Bhagavatapurana 11.30.20

11.30.20

śareṣu hīyamāeṣu bhajyamānesu dhanvasu /
śastreṣu kṣīyamāneṣu muṣṭibhir jahrur erakāḥ //

20. When shafts were exhausted, bows were broken, and weapons were lost, they pulled out handfuls of Eraka grass for their weapons. 21. When held in their fists those Erakas became maces hard like Vajra and with them they struck those whom they hated, and when prevented by Krishna, they struck Him also.