Valmiki Ramayana Ayodhya Kanda Sarga 19 Shloka 39
Original Shlokaतं गुणैस्समतां प्राप्तो भ्राता विपुलविक्रमः। सौमित्रिरनुवव्राज धारयन्दुःखमात्मजम्।।2.19.39।।
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गुणैः in virtues, समतां equality, प्राप्तः obtained, विपुलविक्रमः with great power, भ्राता brother, सौमित्रिः Lakshmana, आत्मजम् born in his mind, दुःखम् sorrow, धारयन् controlling, तम् him, अनुवव्राज followed.
Mighty Lakshmana as virtuous as his brother held the sorrow in his mind and followed him.