Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 14
Sanskrit:
सोऽपि दग्धाविति मृषा मन्वानो बलकेशवौ ।बलमाकृष्य सुमहन्मगधान् मागधो ययौ ॥ १४ ॥
ITRANS:
so ’pi dagdhāv iti mṛṣāmanvāno bala-keśavaubalam ākṛṣya su-mahanmagadhān māgadho yayau
Translation:
Jarāsandha, moreover, mistakenly thought that Balarāma and Keśava had burned to death in the fire. Thus he withdrew his vast military force and returned to the Magadha kingdom.