Valmiki Ramayana Ayodhya Kanda Sarga 48 Shloka 8
Original Shlokaएकः सत्पुरुषो लोके लक्ष्मण स्सह सीतया। योऽनुगच्छति काकुत्स्थं रामं परिचरन् वने।।2.48.8।।
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लोके in this world, एकः only, लक्ष्मणः Lakshmana, सत्पुरुषः is a (fortunate) pious person, यः who, सीतया सह with sita, काकुत्स्थम् of Kakutstha race, रामम् Rama, वने in the forest, परिचरन् attending on them, अनुगच्छति follows.
Lakshmana is the only fortunate person in the world who has followed Rama of the Kakutstha race along with Sita to serve them.