'dvitīya catur-vyūha' ei--turīya, viśuddha
vāsudeva-the expansion named Vāsudeva; saṅkarṣaṇa-the expansion named Saṅkarṣaṇa; pradyumna-the expansion named Pradyumna; aniruddha-the expansion named Aniruddha; dvitīya catuḥ-vyūha-the second quadruple expansion; ei-this; turīya-transcendental; viśuddha-free from all material contamination.
Vāsudeva, Saṅkarṣaṇa, Pradyumna and Aniruddha constitute this second quadruple. They are purely transcendental.
"All the varied expansions of the Personality of Godhead are transcendental and eternal, and all of them repeatedly descend to all the different universes of the material creation. Their bodies, composed of eternity, bliss and knowledge, are everlasting; there is no chance of their decaying, for they are not creations of the material world. Their forms are concentrated spiritual existence, always complete with all spiritual qualities and devoid of material contamination."