Śrīmad-Bhāgavatam · Text 10.11.37
Who is speaking and story frame
एवं व्रजौकसां प्रीतिं यच्छन्तौ बालचेष्टितै: ।
कलवाक्यै: स्वकालेन वत्सपालौ बभूवतु: ॥ ३७ ॥
evaṁ vrajaukasāṁ prītiṁ
yacchantau bāla-ceṣṭitaiḥ
kala-vākyaiḥ sva-kālena
vatsa-pālau babhūvatuḥ
In this way, Kṛṣṇa and Balarāma, acting like small boys and talking in half-broken language, gave transcendental pleasure to all the inhabitants of Vraja. In due course of time, They became old enough to take care of the calves.
Read Śrīla Prabhupāda's purport on Vedabase.io