After the great saint Viśravā, the master of mystic yoga, received absolute knowledge from his father, he begot in the womb of Ilavilā the greatly celebrated son known as Kuvera, the giver of money.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
तस्यामुत्पादयामास विश्रवा धनदं सुतम् । प्रादाय विद्यां परमामृषिर्योगेश्वरात्पितुः
tasyāmutpādayāmāsa viśravā dhanadaṃ sutam | prādāya vidyāṃ paramāmṛṣiryogeśvarātpituḥ
SB 9.2.32