CC Madhya 20.192
paravyoma-madhye vaise nārāyaṇa-rūpe
“Lord Kṛṣṇa again expands, and within the paravyoma, the spiritual sky, He is situated in fullness as the four-handed Nārāyaṇa, accompanied by expansions of the original quadruple form.
At the top of the paravyoma, the spiritual sky, there is Goloka Vṛndāvana, which is divided into three parts. Two of the parts, called Mathurā and Dvārakā, are the residences of Kṛṣṇa in His prābhava-vilāsa forms. Balarāma, Kṛṣṇa’s vaibhava-prakāśa, is eternally situated in Gokula. From the quadruple prābhava-vilāsa, twenty-four forms of the vaibhava-vilāsa are expanded. Each has four hands holding weapons in different positions. The topmost planet in the spiritual sky is Goloka Vṛndāvana, and below that planet is the spiritual sky itself. In that spiritual sky, Kṛṣṇa Himself is four-handed and is situated as Nārāyaṇa.