Bhagavad Gita 3.42
It is said that the senses are powerful; however, beyond the senses is the mind, beyond the mind is the intellect, and greater than the intellect is He.
इन्द्रियाणि पराण्याहुरिन्द्रियेभ्यः परं मनः।
मनसस्तु परा बुद्धिर्यो बुद्धेः परतस्तु सः॥indriyāṇi parāṇyāhurindriyebhyaḥ paraṃ manaḥ|
manasastu parā buddhiryo buddheḥ paratastu saḥ||
English translation (above): Shri Purohit Swami (1935), public domain. Sanskrit text via github.com/gita/gita (Unlicense).