Śrī Caitanya Caritamrta · Text Ādi 4.76
অবতারী কৃষ্ণ যৈছে করে অবতার ।
অংশিনী রাধা হৈতে তিন গণের বিস্তার ॥ ৭৬ ॥
avatārī kṛṣṇa yaiche kare avatāra
aṁśinī rādhā haite tina gaṇera vistāra
Just as the fountainhead, Lord Kṛṣṇa, is the cause of all incarnations, so Śrī Rādhā is the cause of all these consorts.
Read this verse on Vedabase.ioThis verse has no purport; its meaning is explained by the verses around it.