Pati vrata dharmam - sanskrit sloka

[soundararajan50]

विशीलः कामवृत्तो वा गुणैर्वा परिवर्जितः
उपचार्यः स्त्रिया साध्व्या सततं देववत्पतिः

viśīlaḥ kāmavṛtto vā guṇairvā parivarjitaḥ
upacāryaḥ striyā sādhvyā satataṃ devavatpatiḥ

A virtuous wife must always treat her husband like a god even if he's ill-behaved, dissipated, or devoid of virtues.

- Manu smriti