Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 22
Sanskrit:
तत्रोपानन्दनामाह गोपो ज्ञानवयोऽधिक: ।देशकालार्थतत्त्वज्ञ: प्रियकृद् रामकृष्णयो: ॥ २२ ॥
ITRANS:
tatropananda-nāmāhagopo jñāna-vayo-’dhikaḥdeśa-kālārtha-tattva-jñaḥpriya-kṛd rāma-kṛṣṇayoḥ
Translation:
At this meeting of all the inhabitants of Gokula, a cowherd man named Upananda, who was the most mature in age and knowledge and was very experienced according to time, circumstances and country, made this suggestion for the benefit of Rāma and Kṛṣṇa.