One verse

Bhagavad Gita 3.34

3.34

इन्द्रियस्येन्द्रियस्यार्थे रागद्वेषौ व्यवस्थितौ | तयोर्न वशमागच्छेत्तौ ह्यस्य परिपन्थिनौ ||३-३४||

indriyasyendriyasyārthe rāgadveṣau vyavasthitau . tayorna vaśamāgacchettau hyasya paripanthinau ||3-34||

indriyasya
of the senses
indriyasya arthe
in the sense objects
rāga
attachment
dveṣau
also detachment
vyavasthitau
put under regulations
tayoḥ
of them
na
never
vaśam
control
āgacchet
one should come
tau
those
hi
certainly
asya
his
paripanthinau
stumbling blocks

There are principles to regulate attachment and aversion pertaining to the senses and their objects. One should not come under the control of such attachment and aversion, because they are stumbling blocks on the path of self-realization.