tathā - in this manner; ati-rabhasān - running very swiftly; tān - they; tu - and; saṁyattān - ready to strike; rohiṇī-sutaḥ - the son of Rohiṇī, Lord Balarāma; ahan - beat down; parigham - His club; udyamya - wielding; paśūn - animals; iva - as; mṛga-adhipaḥ - the lion, king of animals.

As they ran swiftly toward the two Lords, ready to strike, the son of Rohiṇī slew them with His club just as a lion easily kills other animals.