Canto 3 -
Araṇya-kāṇḍa
Chapter 43: Sītā Sees the Magical Deer
In delight Sītā-devī called out to Śrī Rāma and Śrī Lakṣmaṇa and showed Them the magical deer. Though Lakṣmaṇa informed Rāma that it would be the magic of Mārīca because it is impossible for an ordinary deer to have such jewelled spots and so on, Sītā disregarded His words and with great eagerness requested Rāma to bring the deer. Rāmacandra told Lakṣmaṇa that even if the deer was Mārīca in disguise, He would certainly kill him just as Agastya killed Vātāpi in disguise. Lord Rāma then declared that after killing the deer He would bring its skin and requested Lord Lakṣmaṇa to protect Sītā-devī in the meanwhile.