Srimad-Bhagavatam: Canto 9 - Chapter 1 - Verse 22
Sanskrit:
तस्मै कामवरं तुष्टो भगवान् हरिरीश्वर: ।ददाविलाभवत् तेन सुद्युम्न: पुरुषर्षभ: ॥ २२ ॥
ITRANS:
tasmai kāma-varaṁ tuṣṭobhagavān harir īśvaraḥdadāv ilābhavat tenasudyumnaḥ puruṣarṣabhaḥ
Translation:
The Supreme Personality of Godhead, the supreme controller, being pleased with Vasiṣṭha, gave him the benediction he desired. Thus Ilā was transformed into a very fine male named Sudyumna.