Valmiki Ramayana Kishkindha Kanda Sarga 31 Shloka 15

आशुगः swift, गज इव like an elephant, वेगतः speedily, तरसा vigorously, सालतालाश्वकर्णांश्च sala, tala, and asvakarna, पातयन् felling trees, अन्यान् and others, द्रुमांश्च trees, गिरिकूटानि mountain rocks, बलात् forcibly, पर्यस्यन् turning them, पद्भ्याम् with his feet, शिलाः rocks, शकलीकुर्वन् breaking to pieces, दूरम् a distance, एकपदे with one foot, त्यक्त्वा pushing, कार्यवशात् to carry out the task, द्रुतम् quickly, ययौ went.

'Lakshmana rushed on foot speedily, cutting the branches of sala, tala and asvakarna and other trees on the way and forcibly turning and crushing the mountain rocks into pieces with a single foot, like a swiftmoving elephant taking long strides, to carry out the task.