Valmiki Ramayana Ayodhya Kanda Sarga 39 Shloka 20

अस्मिन् in this, सर्वलोके in all the worlds, असत्यः untrue, स्त्रियः women, प्रियैः by husbands, सततम् at all times, सत्कृताः though honoured, विनिपातगतम् fallen into misfortunes, भर्तारम् husband, नानुमन्यन्ते do not agree (follow).

Those women who, although always gratified, do not follow their husband when they fall into misfortune, are regarded as unfaithful.