Valmiki Ramayana Ayodhya Kanda Sarga 118 Shloka 9

धर्मचारिणि O follower of righteous duty (Anasuya), ते वाक्यैः your words, तत् सर्वम् all that, नवीकृतम् renewed (reminded afresh), नार्याः for women, पतिशुश्रूषणात् more than obedience to her husband, अन्यत् other, तपः ascetic practice, न विधीयते is not laid down.

O righteous one (Anasuya), after listening to your words the instructions given by my motherinlaw and my mother are renewed (remembered again). For a woman, no other penance is laid down (in scriptures) except service to her husband.