SB 10.71.7

brahma-veṣa-dharo gatvā
 taṁ bhikṣeta vṛkodaraḥ
haniṣyati na sandeho
 dvai-rathe tava sannidhau
Synonyms: 
brahma — of a brāhmaṇa; veṣa — the dress; dharaḥ — wearing; gatvā — going; tam — to him, Jarāsandha; bhikṣeta — should beg; vṛka-udaraḥ — Bhīma; haniṣyati — he will kill him; na — no; sandehaḥ — doubt; dvai-rathe — in one-on-one chariot combat; tava — Your; sannidhau — in the presence.
Translation: 
Bhīma should go to him disguised as a brāhmaṇa and beg charity. Thus he will obtain single combat with Jarāsandha, and in Your presence Bhīma will no doubt kill him.
Purport: 

The idea is that Bhīma should beg as charity a one-to-one fight with Jarāsandha.