Arthashastra
तीर्थ उपरोधो हि धर्म वध इति कौटिल्यः ॥ इति ह्रस्व प्रवासः ॥
for neglect of intercourse with wife after her monthly ablution is, in the opinion of Kautilya, a violation of one's duty (tirthoparodho hi dharmavadha iti Kautilyah).
english translation
tIrtha uparodho hi dharma vadha iti kauTilyaH ॥ iti hrasva pravAsaH ॥
hk transliteration by Sanscript