Valmiki Ramayana Ayodhya Kanda Sarga 21 Shloka 25

त्वद्वियोगात् by being separated from you, मे for me, जीवितेन with life, सुखेन वा or with happiness, कार्यम् any purpose, न not, त्वया सह along with you, मम to me, तृणानाम् of grass, भक्षणम् अपि feeding also, श्रेयः is preferable.

Separated from you, I have no use of this life or happiness. I prefer to live with you even if it means eating grass.