One verse

Srimad Bhagavatam 10.57.26

10.57.26

उवास तस्यां कतिचिन्मिथिलायां समा विभु: । मानित: प्रीतियुक्तेन जनकेन महात्मना । ततोऽशिक्षद् गदां काले धार्तराष्ट्र: सुयोधन: ॥ २६ ॥

uvāsa tasyāṁ katicin mithilāyāṁ samā vibhuḥ mānitaḥ prīti-yuktena janakena mahātmanā tato ’śikṣad gadāṁ kāle dhārtarāṣṭraḥ suyodhanaḥ

uvāsa
He lived
tasyām
there
katicit
several
mithilāyām
in Mithila
samāḥ
years
vibhuḥ
the almighty Lord, Śrī Balarāma
mānitaḥ
honored
prīti-yuktena
affectionate
janakena
by King Janaka (Videha)
mahā-ātmanā
the great soul
tataḥ
then
aśikṣat
learned
gadām
the club
kāle
in time
dhārtarāṣṭraḥ
the son of Dhṛtarāṣṭra
suyodhanaḥ
Duryodhana

The almighty Lord Balarāma stayed in Mithilā for several years, honored by His affectionate devotee Janaka Mahārāja. During that time Dhṛtarāṣṭra’s son Duryodhana learned from Balarāma the art of fighting with a club.