Śrī Caitanya Caritamrta · Text Madhya 4.79
একদিনের উদ্যোগে ঐছে মহোত্সব কৈল ।
গোপাল-প্রভাবে হয়, অন্যে না জানিল ॥ ৭৯ ॥
eka-dinera udyoge aiche mahotsava kaila
gopāla-prabhāve haya, anye nā jānila
The wonderful festival and installation of Śrī Gopālajī was arranged in one day. Certainly all this was accomplished by the potency of Gopāla. No one but a devotee can understand this.
Read Śrīla Prabhupāda's purport on Vedabase.io