Canto 3 -
Araṇya-kāṇḍa
Chapter 58: Rāma Reaches His Āśrama in Anxiety

Rāma describes Sītā-devī’s qualities and states that He will be unable to live without her. While lamenting in many ways, He considers that Sītā might have sent Lakṣmaṇa to help Him upon hearing Mārīca’s voice and that the rākṣasas might have killed Sītā with a desire to avenge Rāma’s killing of Khara.