Bhagavatapurana 10.1.51

10.1.51

agner yathā dāru-viyoga-yogayor adṛṣṭato 'nyan na nimittam asti /
evaṃ hi jantor api durvibhāvyaḥ śarīra-saṃyoga-viyoga-hetuḥ //

51. Just as in the case of the fire in a forest there is no cause other than the (force of) unseen (Providence) for its coming into contact with the trees or for its being distanced therefrom, so also in the case of a Jiva the cause of his being joined to a body or separated therefrom is indeed beyond our thought.