Valmiki Ramayana Kishkindha Kanda Sarga 20 Shloka 18
Original Shlokaसमाश्वासय पुत्रं त्वं सन्देशं सन्दिशस्व मे। मूर्ध्नि चैनं समाघ्राय प्रवासं प्रस्थितो ह्यसि4.20.18।।
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त्वम् you, पुत्रम् son, समाश्वासय console him, एनम् him, मूर्ध्नि touching his forehead, समाघ्राय enjoying the sweet smell of his body, च एनं him, सन्देशम् instructon, सन्दिश्व consoling him, प्रवासम् on a journey, प्रस्थितः going, असि हि you are.
'O lord you have set out on a long journey. Kiss your son on the forehead, enjoy its sweet smell, console him and give him your message.