SB 5.3.1
sri-suka uvaca
nabhir apatya-kamo ’prajaya merudevya bhagavantam yajña-purusam avahitatmayajata.
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Sukadeva Gosvami continued to speak: Maharaja Nabhi, the son of Agnidhra, wished to have sons, and therefore he attentively began to offer prayers and worship the Supreme Personality of Godhead, Lord Visnu, the master and enjoyer of all sacrifices. Maharaja Nabhi’s wife, Merudevi, who had not given birth to any children at that time, also worshiped Lord Visnu along with her husband.