Valmiki Ramayana Ayodhya Kanda Sarga 52 Shloka 75
Original Shlokaआरोह त्वं नरव्याघ्र स्थितां नावमिमां शनैः। सीतां चारोपयान्वक्षं परिगृह्य मनस्विनीम्।।2.52.75।।
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नरव्याघ्रः (best) among men (Lakshmana), त्वम् you, स्थितम् standing, इमाम् this, नावम् boat, शनैः slowly, आरोह board, अन्वक्षम् along with the beam, मनस्विनीम् highminded, सीतां च Sita also, परिगृह्य holding her, आरोपय help her to get in.
O Lakshmana, the best of men the boat stands ready, get into it slowly (carefully), and then help the noble Sita board it by holding the beam (which balances the boat).