KAIVALYA UPANISHAD · 13

स्वप्ने स जीवः सुखदुःखभोक्ता स्वमायया कल्पितजीवलोके ।
सुषुप्तिकाले सकले विलीने तमोऽभिभूतः सुखरूपमेति ॥ १३॥

svapne sa jīvaḥ sukhaduḥkhabhoktā svamāyayā kalpitajīvaloke ।
suṣuptikāle sakale vilīne tamo’bhibhūtaḥ sukharūpameti ॥ 13॥

In the dreaming state, the Jīva enjoys pleasures and pains in the several worlds which are created by His Māyā. In the dreamless sleeping state when all are absorbed, He, replete with Tamas, attains the state of happiness.

K. Narayanasvami Aiyar · Thirty Minor Upanishads (1914), pp. 31–33