One verse

Srimad Bhagavatam 9.19.17

9.19.17

मात्रा स्वस्रा दुहित्रा वा नाविविक्तासनो भवेत् । बलवानिन्द्रियग्रामो विद्वांसमपि कर्षति ॥ १७ ॥

matra svasra duhitra va naviviktasano bhavet balavan indriya-gramo vidvamsam api karsati

matra
with one’s mother
svasra
with one’s sister
duhitra
with ones own daughter
va
either
na
not
avivikta-asanah
seated closely on one seat
bhavet
one should be
balavan
very strong
indriya-gramah
the group of senses
vidvamsam
the very learned and advanced person
api
even
karsati
agitates.

One should not allow oneself to sit on the same seat even with one’s own mother, sister or daughter, for the senses are so strong that even though one is very advanced in knowledge, he may be attracted by sex.