Valmiki Ramayana Ayodhya Kanda Sarga 80 Shloka 5
Original Shlokaते स्ववारं समास्थाय वर्त्मकर्मणि कोविदाः। करणैर्विविधोपेतैः पुरस्तात्सम्प्रतस्थिरे।।2.80.5।।
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वर्त्मकर्मणि in the construction of roads, कोविदाः skilled, ते those, विविधोपेतैः with different kinds of, करणैः tools, स्ववारम् their own group, समास्थाय taking up the place, पुरस्तात् ahead, सम्प्रतस्थिरे departed.
Those groups who were skilled in the construction of roads took up their places with every kind of tool and departed ahead of others.