sa śuśruvān mātari bhārgaveṇa
pitur niyogāt prahṛtaṁ dviṣad-vat
pratyagṛhīd agraja-śāsanaṁ tad
ājñā gurūṇāṁ hy avicāraṇīyā
saḥ - He (Lakṣmaṇa, the brother of Lord Rāmacandra); śuśruvān - hearing; mātari - unto the mother; bhārgaveṇa - by Paraśurāma; pituḥ - of the father; niyogāt - by the order; prahṛtam - killing; dviṣat-vat - like an enemy; pratyagṛhīt - accepted; agraja-śāsanam - the order of the elder brother; tat - that; ājñā - order; gurūṇām - of superior persons, such as the spiritual master or father; hi - because; avicāraṇīyā - to be obeyed without consideration.
This is a quotation from the Raghu-vaṁśa (14.46). Lord Rāmacandra’s statement to Sītā given below is from the Rāmāyaṇa (Ayodhyā-kāṇḍa 22.9).