Skandapurana 14.54.7

14.54.7

evamukto vasiṣṭhena brahmā loka pitāmahaḥ ..
dhyātvā tatrānayāmāsa jyeṣṭhamadhyakaniṣṭhikam ..
puṣkaratritayaṃ cāgātsupuṇye salilāśaye .. 7 ..

Addressed thus by Vasiṣṭha, Brahmā, the grandfather of the worlds, / meditated and brought there the senior, middle, and junior ones; / and the triad of Puṣkaras entered into a most holy reservoir of water.