Kansa informed by Nārada of the existence of Krishna and Balarāma; he sends Kesin to destroy them and Akrura to bring them to Mathura - Verse 12
Vishnu Purana (GRETIL; M. M. Pathak critical edition) · 4 · Verse 15.12
Sanskrit Original
बलभद्रसारणशठदुर्मदादीन पुत्रान रोहिण्याम आनकदुन्दुभिर उत्पादयाम आस। बलभद्रो ऽपि रेवत्यां निशठोल्मुकौ पुत्राव अजनयत। मार्ष्टिमार्षिमच्छिशिशिशुसत्यधृतिप्रमुखाः सारणस्यात्मजाः। भद्राश्वभद्रबाहुदुर्दमभूताद्या रोहिण्याः कुलजाः।।
balabhadrasāraṇaśaṭhadurmadādīn putrān rohiṇyām ānakadundubhir utpādayām āsa| balabhadro 'pi revatyāṃ niśaṭholmukau putrāv ajanayat| mārṣṭimārṣimacchiśiśiśusatyadhṛtipramukhāḥ sāraṇasyātmajāḥ| bhadrāśvabhadrabāhudurdamabhūtādyā rohiṇyāḥ kulajāḥ||
From Rohini, the son of Anakadundubhi, Balabhadra produced sons like Shatha and Durmada. Balabhadra also begot two sons in Revati. The sons of Saran were Marṣṭi, Marṣima, and others. The noble daughters of Rohini included Bhadrashva, Bhadrabahu, and Durdamabhuta.