Valmiki Ramayana 2.52.50
भविष्यन्ति वने यानि तपो विघ्न कराणि ते ।रथेन प्रतिबाधिष्ये तानि सत्त्वानि राघव॥
bhaviṣyanti vane yāni tapo vighna karāṇi te |rathena pratibādhiṣye tāni sattvāni rāghava ||
Our plain-language meaning of this verse is waiting for scholar review.