SB 1.6 - Nārada's change of body
In due course of time, Nārada, who was fully absorbed in thinking of Kṛṣṇa (kṛṣṇa-mater), being completely freed from all material taints, met with death, as lightning and illumination occur simultaneously. A devotee, who is guaranteed to pass on to the kingdom of God, where life is eternal, fully cognizant and blissful, has no hankering for material things. And in due course of time, when a pure devotee is completely prepared, the change of body occurs. A devotee simultaneously changes his material body and develops a spiritual body exactly like illumination following lightning immediately. It is said that the intelligence even when identified with the Lord completely, being non different, still has the ability to make distinctions. But this case was different. Intelligence could not make a distinction. Suddenly the two things – disappearance of the material body and attainment of the spiritual body – simultaneously made their appearance. Even before death, a pure devotee has no material affection, due to his body being spiritualized like a red hot iron in contact with fire.