Bhagavatapurana 2.2.16

2.2.16

manaḥ svabuddhyāmalayā niyamya kṣetrajña etāṃ ninayet tam ātmani /
ātmānam ātmanyavarudhya dhīro labdhopaśāntirvirameta kṛtyāt //

16. *Having restrained the mind by the strength of pure Buddhi, he should withdraw that Buddhi into Kshetragna and Kshetragna into Self and the Self into Paramatman, and having thus attained tranquillity, the wise man should turn away from (all activity).