This foretelling (of the devastation up to the earthly planets) is by the past experience of Brahmaji, who knew that in that fearful devastating scene, the Vedas would come out of his mouth

Expressions researched:
"This foretelling is by the past experience of Brahmājī, who knew that in that fearful devastating scene, the Vedas would come out of his mouth"

Srimad-Bhagavatam

SB Canto 2

Uring one day of Brahmā there are fourteen Manus, and at the end of each Manu there is devastation up to the earthly planets, and the vast water is fearful even to Brahmā. So in the beginning of the would-be Vaivasvata Manu, such devastation would be seen by him. There would be many other incidents also, such as the killing of the famous Śaṅkhāsura. This foretelling is by the past experience of Brahmājī, who knew that in that fearful devastating scene, the Vedas would come out of his mouth.

SB 2.7.12, Translation and Purport

At the end of the millennium, the would-be Vaivasvata Manu, of the name Satyavrata, would see that the Lord in the fish incarnation is the shelter of all kinds of living entities, up to those in the earthly planets. Because of my fear of the vast water at the end of the millennium, the Vedas come out of my [Brahmā's] mouth, and the Lord enjoys those vast waters and protects the Vedas.

During one day of Brahmā there are fourteen Manus, and at the end of each Manu there is devastation up to the earthly planets, and the vast water is fearful even to Brahmā. So in the beginning of the would-be Vaivasvata Manu, such devastation would be seen by him. There would be many other incidents also, such as the killing of the famous Śaṅkhāsura. This foretelling is by the past experience of Brahmājī, who knew that in that fearful devastating scene, the Vedas would come out of his mouth, but the Lord in His fish incarnation not only would save all living entities, namely the demigods, animals, men and great sages, but would also save the Vedas.