Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 18

Sanskrit:

तव राम यदि श्रद्धा युध्यस्व धैर्यमुद्वह ।हित्वा वा मच्छरैश्छिन्नं देहं स्वर्याहि मां जहि ॥ १८ ॥

ITRANS:

tava rāma yadi śraddhāyudhyasva dhairyam udvahahitvā vā mac-charaiś chinnaṁdehaṁ svar yāhi māṁ jahi

Translation:

You, Rāma, should gather Your courage and fight with me, if You think You can do it. You may either give up Your body when it is cut to pieces by my arrows, and thus attain to heaven, or else kill me.

Purport:

According to ācārya Śrīdhara Svāmī, Jarāsandha suspected that Lord Balarāma’s body was indestructible, and thus he offered what might be a more practical alternative, that Balarāma kill Jarāsandha.