SB 10.50.47

āvayoḥ — the two of Us; yudhyatoḥ — while fighting; asya — with him (Kālayavana); yadi — if; āgantā — comes; jarā-sutaḥ — the son of Jarā; bandhūn — Our relatives; haniṣyati — he will kill; atha vā — or else; neṣyate — he will take; sva — to his own; puram — city; balī — strong.