Valmiki Ramayana Aranya Kanda Sarga 50 Shloka 17
Original Shlokaस भारस्सौम्य भर्तव्यो यो नरं नावसादयेत्।।3.50.17।। तदन्नमपि भोक्तव्यं जीर्यते यदनामयम्।
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सौम्य O gentle one, यः that which, नरम् man, नावसादयेत् does not fatigue, सः such, भारः weight, भर्तव्यः should be carried, यत् which, अनामयम् free from any disease, जीर्यते is digested, तत् that only, अन्नम् food, भोक्तव्यम् should be eaten, अपि even.
O gentle Ravana one should carry that much of weight which does not tire him. One should eat only that wholesome food which can be easily digested.