Valmiki Ramayana Ayodhya Kanda Sarga 46 Shloka 21
Original Shlokaयावदेव तु संसुप्ता स्तावदेव वयं लघु। रथमारुह्य गच्छामः पन्थानमकुतोभयम्।।2.46.21।।
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यावदेव so long as, संसुप्ताः they are asleep, तावदेव so long, वयम् we, लघु quickly, रथम् chariot, आरुह्य mounting, अकुतोभयम् without fear, पन्थानम् on our way, गच्छाम we shall go.
While they are asleep, we shall quickly mount the chariot and fearlessly proceed on the way.