SB 8.1.21
rses tu vedasirasas
tusita nama patny abhut
tasyam jajñe tato devo
vibhur ity abhivisrutah
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Vedasira was a very celebrated rsi. From the womb of his wife, whose name was Tusita, came the avatara named Vibhu.