Valmiki Ramayana 2.8.6

लक्ष्मणो हि महेष्वासो रामं सर्वात्मना गतः ।शत्रुघ्नश्चापि भरतं काकुत्थ्सं लक्ष्मणो यथा॥

lakṣmaṇo hi maheṣvāso rāmaṃ sarvātmanā gataḥ |śatrughnaścāpi bharataṃ kākutthsaṃ lakṣmaṇo yathā ||

Our plain-language meaning of this verse is waiting for scholar review.