Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 34

Sanskrit:

कृष्णरामौ परिष्वज्य पितरावभिवाद्य च ।न किञ्चनोचतु: प्रेम्णा साश्रुकण्ठौ कुरूद्वह ॥ ३४ ॥

ITRANS:

kṛṣṇa-rāmau pariṣvajyapitarāv abhivādya cana kiñcanocatuḥ premṇāsāśru-kaṇṭhau kurūdvaha

Translation:

O hero of the Kurus, Kṛṣṇa and Balarāma embraced Their foster parents and bowed down to them, but Their throats were so choked up with tears of love that the two Lords could say nothing.

Purport:

After a long separation, a respectful child should first offer obeisances to his parents. Nanda and Yaśodā gave their sons no opportunity for this, however, for as soon as they saw Them they embraced Them. Only then could Kṛṣṇa and Balarāma offer Their proper respects.