One verse

Srimad Bhagavatam 7.12.11

7.12.11

एतत्सर्वं गृहस्थस्य समाम्नातं यतेरपि । गुरुवृत्तिर्विकल्पेन गृहस्थस्यर्तुगामिन: ॥ ११ ॥

etat sarvam grhasthasya samamnatam yater api guru-vrttir vikalpena grhasthasyartu-gaminah

etat
this
sarvam
all
grhasthasya
of a householder
samamnatam
described
yateh api
even of the person in the renounced order
guru-vrttih vikalpena
to follow the orders of the spiritual master
grhasthasya
of the householder
rtu-gaminah
accepting sex only during the period favorable for procreation.

All the rules and regulations apply equally to the householder and the sannyasi, the member of the renounced order of life. The grhastha, however, is given permission by the spiritual master to indulge in sex during the period favorable for procreation.