Śukadeva Gosvāmī continued to speak: Mahārāja Nābhi, the son of Āgnīdhra, wished to have sons, and therefore he attentively began to offer prayers and worship the Supreme Personality of Godhead, Lord Viṣṇu, the master and enjoyer of all sacrifices. Mahārāja Nābhi’s wife, Merudevī, who had not given birth to any children at that time, also worshiped Lord Viṣṇu along with her husband.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
श्रीशुक उवाच । नाभिरपत्यकामोऽप्रजया मेरुदेव्या भगवन्तं यज्ञपुरुषमवहितात्मायजत
śrīśuka uvāca | nābhirapatyakāmo'prajayā merudevyā bhagavantaṃ yajñapuruṣamavahitātmāyajata
SB 5.3.1