Canto 3 -
Araṇya-kāṇḍa
Chapter 36: Rāvaṇa Requests Mārīca to Help him
Text 3.36.20
ततस्तयोरपाये तु शून्ये सीतां यथासुखम्।
निराबाधो हरिष्यामि राहुश्चन्द्रप्रभामिव॥
tatas tayor apāye tu śūnye sītāṁ yathā-sukham
nirābādho hariṣyāmi rāhuś candra-prabhām iva
tataḥ = and then; tayoḥ apāye = when leave [her]; tu = Rāma and Lakṣmaṇa; śūnye = alone; sītām = Sītā; yathā-sukham = happily; nirābādhaḥ = without any hindrance; hariṣyāmi = I will take away; rāhuḥ = Rāhu; candra-prabhām = [takes away] moonlight; iva = just as.
And then when Rāma and Lakṣmaṇa leave [her] alone, I will happily take Sītā away without any hindrance just as Rāhu [takes away] moonlight.