SB 8.5.9
tatrapi devasambhutyam
vairajasyabhavat sutah
ajito nama bhagavan
amsena jagatah patih
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
In this sixth manvantara millennium, Lord Visnu, the master of the universe, appeared in His partial expansion. He was begotten by Vairaja in the womb of his wife, Devasambhuti, and His name was Ajita.