One verse

Srimad Bhagavatam 11.7.52

11.7.52

नातिस्‍नेह: प्रसङ्गो वा कर्तव्य: क्व‍ापि केनचित् । कुर्वन् विन्देत सन्तापं कपोत इव दीनधी: ॥ ५२ ॥

nāti-snehaḥ prasaṅgo vā kartavyaḥ kvāpi kenacit kurvan vindeta santāpaṁ kapota iva dīna-dhīḥ

na
not
ati-snehaḥ
excess affection
prasaṅgaḥ
close association
vā
or
kartavyaḥ
one should manifest
kva api
ever
kenacit
with anyone or anything
kurvan
so doing
vindeta
one will experience
santāpam
great distress
kapotaḥ
the pigeon
iva
just as
dīna-dhīḥ
cripple-minded

One should never indulge in excessive affection or concern for anyone or anything; otherwise one will have to experience great suffering, just like the foolish pigeon.