Bhagavatapurana 11.23.47

11.23.47

mano-vaśe 'nye hy abhavan sma devā manaś ca nānyasya vaśaṃ sameti /
bhīṣmo hi devaḥ sahasaḥ sahīyān yuñjyād vaśe taṃ sa hi deva-devaḥ //

48. The gods and the senses presided over by them are under the control of the mind and the mind does not come under the control of any other: for the formidable god called Mind is stronger than the strongest; therefore he who could bring it under his control is indeed the god of gods.