Once upon a time he (Vyasadeva), as the sun rose, took his morning ablution in the waters of the Sarasvati and sat alone to concentrate

Expressions researched:
"Once upon a time he" |"Vyasadeva" |"as the sun rose, took his morning ablution in the waters of the Sarasvati and sat alone to concentrate"

Srimad-Bhagavatam

SB Canto 1

Once upon a time he (Vyāsadeva), as the sun rose, took his morning ablution in the waters of the Sarasvatī and sat alone to concentrate.

SB 1.4.15, Translation and Purport

Once upon a time he (Vyāsadeva), as the sun rose, took his morning ablution in the waters of the Sarasvatī and sat alone to concentrate.

The River Sarasvatī is flowing in the Badarikāśrama area of the Himalayas. So the place indicated here is Śamyāprāsa in Badarikāśrama, where Śrī Vyāsadeva is residing.