Summary of chapter 52 of the Brahma Vaivarta Mahā Purana - Prakṛti Khaṇḍa is as follows:

In the secluded, blossom-filled bowers of Bhāṇḍīravana forest, Lord Brahmā personally descended from Satyaloka to officiate the sacred celestial marriage of Lord Śrī Kṛshṇa and Goddess Śrī Rādhā. Serving as the divine priest, Lord Brahmā chanted the sacred Vedic Mantras, kindled the holy fire, and conducted the auspicious circumambulation ceremony, uniting the divine couple in accordance with eternal spiritual law. Having completed this supreme privilege of his existence, Lord Brahmā offered prostrate obeisances to the divine bride and groom, seeking their eternal blessings before returning to his celestial abode with an ecstatic heart.