SB 3.32.8
dvi-parardhavasane yah
pralayo brahmanas tu te
tavad adhyasate lokam
parasya para-cintakah
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Worshipers of the Hiranyagarbha expansion of the Personality of Godhead remain within this material world until the end of two parardhas, when Lord Brahma also dies.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
One dissolution is at the end of Brahma’s day, and one is at the end of Brahma’s life. Brahma dies at the end of two parardhas, at which time the entire material universe is dissolved. Persons who are worshipers of Hiranyagarbha, the plenary expansion of the Supreme Personality of Godhead Garbhodakasayi Visnu, do not directly approach the Supreme Personality of Godhead in Vaikuntha. They remain within this universe on Satyaloka or other higher planets until the end of the life of Brahma. Then, with Brahma, they are elevated to the spiritual kingdom.
The words parasya para-cintakah mean “always thinking of the Supreme Personality of Godhead,” or being always Krsna conscious. When we speak of Krsna, this refers to the complete category of visnu-tattva. Krsna includes the three purusa incarnations, namely Maha-Visnu, Garbhodakasayi Visnu and Ksirodakasayi Visnu, as well as all the incarnations taken together. This is confirmed in the Brahma-samhita. Ramadi-murtisu kala-niyamena tisthan: Lord Krsna is perpetually situated with His many expansions, such as Rama, Nrsimha, Vamana, Madhusudana, Visnu and Narayana. He exists with all His plenary portions and the portions of His plenary portions, and each of them is as good as the Supreme Personality of Godhead. The words parasya para-cintakah mean those who are fully Krsna conscious. Such persons enter directly into the kingdom of God, the Vaikuntha planets, or, if they are worshipers of the plenary portion Garbhodakasayi Visnu, they remain within this universe until its dissolution, and after that they enter.