Valmiki Ramayana Yuddha Kanda Sarga 22 Shloka 67
Original Shlokaद्वितीयेनतथैचाह्नायोजनानितुविंशतिः । कृतानिप्लवगैस्तूर्णंभीमकायैर्महाबलैः ।।6.22.67।।
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तथैन in the same order, भीमकायैः of fierce body, महाबलैः extremely strong, प्लवगैः Vanaras, तूर्णम् soon, द्वितीयेन on the second, अह्ना one day, विंशतिः twenty, योजनानि yojanas, कृतानि built.
In the same order the Vanaras of fierce bodies and extremely strong ones soon built twenty yojanas on the second day.