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sa capi rukminah pautrim
dauhitro jagrhe tatah
vajras tasyabhavad yas tu
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Rukmi’s daughter’s son [Aniruddha] married Rukmi’s son’s daughter [Rocana]. From her was born Vajra, who would remain among the few survivors of the Yadus’ battle with clubs.