Srimad Bhagavatam Canto 09, Chapter 14, Text 14

SB 9.14.14

tasyatma-yonir akrta
 budha ity abhidham nrpa
buddhya gambhiraya yena
 putrenapoduran mudam
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
O Maharaja Pariksit, when Lord Brahma saw that the child was deeply intelligent, he gave the child the name Budha. The moon-god, the ruler of the stars, enjoyed great jubilation because of this son.
Srimad Bhagavatam Canto 09, Chapter 14, Text 13
Srimad Bhagavatam Canto 09, Chapter 14, Text 15-16