Valmiki Ramayana Aranya Kanda Sarga 47 Shloka 16
Original Shlokaतथेत्युक्त्वा च तां रामः कैकेयीमकुतोभयः।।3.47.16।। चकार तद्वचस्तस्या मम भर्ता दृढव्रतः।
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अकुतोभयः a fearless man, दृढव्रतः of firm resolution, मम भर्ता my husband, रामः Rama, तथेति be it so, ताम् her, कैकेयीम् to Kaikeyi, उक्त्वा said, तस्याः her, तत् those, वचः words, चकार executed.
My husband Rama, a man of fearlessness and firm resolution, said to Kaikeyi 'Be it so' and carried out her words.