CC Madhya 13.149
tomā-sabāra smaraṇe, jhuroṅ muñi rātri-dine,
mora duḥkha nā jāne kona jana
“My dearest Śrīmatī Rādhārāṇī, please hear Me. I am speaking the truth. I cry day and night simply upon remembering all you inhabitants of Vṛndāvana. No one knows how unhappy this makes Me.”
It is said: vṛndāvanaṁ parityajya padam ekaṁ na gacchati. In one sense, Kṛṣṇa, the original Personality of Godhead (īśvaraḥ paramaḥ kṛṣṇaḥ sac-cid-ānanda-vigrahaḥ), does not even take one step away from Vṛndāvana. However, in order to take care of various duties, Kṛṣṇa had to leave Vṛndāvana. He had to go to Mathurā to kill Kaṁsa, and then He was taken by His father to Dvārakā, where He was busy with state affairs and disturbances created by demons. Kṛṣṇa was away from Vṛndāvana, and He was not at all happy, as He plainly disclosed to Śrīmatī Rādhārāṇī. She is the dearmost life and soul of Śrī Kṛṣṇa, and He expressed His mind to Her as follows.