Valmiki Ramayana Yuddha Kanda Sarga 85 Shloka 28
Original Shlokaएवमुक्त्वा स द्युतिमान् वचनंभ्रातुरग्रतः । स रावणिवधाकाङ्क्षीलक्ष्मणस्त्वरितोययौ ।।6.85.28।।
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द्युतिमान् brilliant, सःलक्ष्मणः that Lakshmana, भ्रातुः brother, अग्रतःin front, एवम् in that way, वचनम् words, उक्त्वा spoken, रावणिवथाकाङ्क्षी desirous of killing Ravana's son, त्वरितो speedily, ययौ went
Brilliant Lakshmana, having spoken that way in front of his brother, went speedily desirous of killing Ravana's son.