Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 4

Sanskrit:

तां स्तन्यकाम आसाद्य मथ्नन्तीं जननीं हरि: ।गृहीत्वा दधिमन्थानं न्यषेधत् प्रीतिमावहन् ॥ ४ ॥

ITRANS:

tāṁ stanya-kāma āsādyamathnantīṁ jananīṁ hariḥgṛhītvā dadhi-manthānaṁnyaṣedhat prītim āvahan

Translation:

While mother Yaśodā was churning butter, Lord Kṛṣṇa, desiring to drink the milk of her breast, appeared before her, and in order to increase her transcendental pleasure, He caught hold of the churning rod and began to prevent her from churning.

Purport:

Kṛṣṇa was sleeping within the room, and as soon as He got up, He became hungry and went to His mother. Wanting to stop her from churning and drink the milk of her breasts, He stopped her from moving the churning rod.