Valmiki Ramayana Ayodhya Kanda Sarga 30 Shloka 30
Original Shlokaधर्मस्तु गजनासोरु सद्भिराचरितः पुरा। तं चाहमनुवर्तेऽद्य यथा सूर्यं सुवर्चला।।2.30.30।।
1 source checked for this shloka
गजनासोरु O Lady with thighs like the trunk of an elephant, धर्मः righteousness, पुरा formerly, सद्भिः by virtuous men, आचरितः is practised, सुवर्चला wife of Sun (Suvarchala), सूर्यं यथा like Sun, तम् that righteousness, अहम् I, अद्य now, अनुवर्ते shall follow.
O one with (shapely) thighs like the trunk of an elephant follow only the path of righteousness practised earlier by the virtuous as Suvarchala follows the Sun.