Bhagavatapurana 11.11.49

11.11.49

athaitat paramaṃ guhyaṃ śṛṇvato yadu-nandana /
su-gopyam api vakṣyāmi tvaṃ me bhṛtyaḥ suhṛt sakhā //

49. O son of Yadus, because thou art My servant, friend and companion I shall next tell thee that art eagerly listening, of this great secret, though it is to be kept very carefully from others.