The chief of the goddesses of fortune is Srimati Radharani. Therefore, Krsna's appearance in the land of Vraja indicated that the chief goddess of fortune, Radharani, would also appear there very soon

Expressions researched:
"The chief of the goddesses of fortune is Śrīmatī Rādhārāṇī. Therefore, Kṛṣṇa's appearance in the land of Vraja indicated that the chief goddess of fortune, Rādhārāṇī, would also appear there very soon"

Srimad-Bhagavatam

SB Canto 10.1 to 10.13

The abode of Kṛṣṇa is always served by hundreds and thousands of goddesses of fortune. Wherever Kṛṣṇa goes, the goddess of fortune naturally resides with Him. The chief of the goddesses of fortune is Śrīmatī Rādhārāṇī. Therefore, Kṛṣṇa's appearance in the land of Vraja indicated that the chief goddess of fortune, Rādhārāṇī, would also appear there very soon. Nanda Mahārāja's abode was already opulent, and since Kṛṣṇa had appeared, it would be opulent in all respects.

SB 10.5.18, Translation and Purport

O Mahārāja Parīkṣit, the home of Nanda Mahārāja is eternally the abode of the Supreme Personality of Godhead and His transcendental qualities and is therefore always naturally endowed with the opulence of all wealth. Yet beginning from Lord Kṛṣṇa's appearance there, it became the place for the pastimes of the goddess of fortune.

As stated in the Brahma-saṁhitā (BS 5.29), lakṣmī-sahasra-śata-sambhrama-sevyamānaṁ govindam ādi-puruṣaṁ tam ahaṁ bhajāmi. The abode of Kṛṣṇa is always served by hundreds and thousands of goddesses of fortune. Wherever Kṛṣṇa goes, the goddess of fortune naturally resides with Him. The chief of the goddesses of fortune is Śrīmatī Rādhārāṇī. Therefore, Kṛṣṇa's appearance in the land of Vraja indicated that the chief goddess of fortune, Rādhārāṇī, would also appear there very soon. Nanda Mahārāja's abode was already opulent, and since Kṛṣṇa had appeared, it would be opulent in all respects.