niṣeka-garbha-janmāni bālya-kaumāra-yauvanam
niṣeka-garbha-janmāni bālya-kaumāra-yauvanam |
vayo-madhyaṁ jarā mṛtyur ity avasthās tanor nava ||
etā manoratha-mayīr hānyasyoccāvacās tanūḥ |
guṇa-saṅgād upādatte kvacit kaścij jahāti ca ||
(Śrīmad Bhāgavatam: 11.22.47–48)
“Impregnation, gestation, birth, childhood [up to five years], boyhood [up to sixteen years], youth [up to forty-five years], middle age [up to sixty years], old age, and death are the nine states of the body. Sometimes someone [i.e., a jīva] takes on these greater and lesser manifestations of another [i.e., of a material body], which are made of desire, as a result of attachment to the guṇas, and [sometimes someone] gives [them] up [as a result of Śrī Bhagavān’s grace].”