Srimad-Bhagavatam: Canto 4 - Chapter 1 - Verse 32
Sanskrit:
तथा साधय भद्रं ते आत्मानं सुप्रजं नृप ।इष्टस्ते पुत्रकामस्य पुत्रं दास्यति यज्ञभुक् ॥ ३२ ॥
ITRANS:
tathā sādhaya bhadraṁ teātmānaṁ suprajaṁ nṛpaiṣṭas te putra-kāmasyaputraṁ dāsyati yajña-bhuk
Translation:
O King, we wish all good fortune for you. You have no son, but if you pray at once to the Supreme Lord and ask for a son, and if you execute the sacrifice for that purpose, the enjoyer of the sacrifice, the Supreme Personality of Godhead, will fulfill your desire.