Valmiki Ramayana Ayodhya Kanda Sarga 111 Shloka 6

वृद्धायाः of an aged woman, धर्मशीलायाः of a righteousminded woman, मातुः of the mother, अवर्तितुम् not to attend her, नार्हसि is not proper, अस्याः her, वचनम् words, कुर्वन् obeying, सताम् of the virtuous, गतिम् path, नातिवर्तेः you will not deviate.

Here is your aged and righteous mother. It does not behove you to deny your service to her. By obeying her, you will never deviate from the path of the virtuous.