Valmiki Ramayana Ayodhya Kanda Sarga 11 Shloka 12
Original Shlokaतेन वाक्येन संहृष्टा तमभिप्रायमागतम्। व्याजहार महाघोरमभ्यागतमिवान्तकम्।।2.11.12।।
1 source checked for this shloka
तेन वाक्येन by those words, संहृष्टा delighted, अभ्यागतम् suddenly struck, अन्तकमिव like death, महाघोरम् highly dreadful, आगतम् that has come to her mind, तम् अभिप्रायम् her wish, व्याजहार spoke.
Delighted by the words (of the king), Kaikeyi disclosed him her highly dreadful wish which entered her mind like a sudden visitation of death: