Valmiki Ramayana Ayodhya Kanda Sarga 78 Shloka 24
Original Shlokaभरतस्य वचश्श्रुत्वा शत्रुघ्नो लक्ष्मणानुजः। न्यवर्तत ततो रोषात्तां मुमोच च मन्थराम्।।2.78.24।।
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लक्ष्मणानुजः Lakshmana's younger brother, शत्रुघ्नः Satrughna, भरतस्य Bharata's, वचः words, श्रुत्वा after hearing, ततः then, रोषात् from fury, न्यवर्तत restrained, ताम् that, मन्थराम् Manthara, मुमोच च also released.
Hearing the words of Bharata, Satrughna, the younger brother of Lakshmana restrained his fury and also released Manthara.