Canto 2 -
Ayodhyā-kāṇḍa
Chapter 35: Furious Sumantra Criticizes Kaikeyī
Text 2.35.23

माता ते पितरं देवि ततः केकयमब्रवीत्।
शंस मे जीव वा मा वा न मामपहसिष्यसि॥

mātā te pitaraṁ devi tataḥ kekayam abravīt
śaṁsa me jīva vā mā vā na mām apahasiṣyasi

mātā = mother; te = your; pitaram = your father; devi = O queen; tataḥ = then; kekayam = Kekaya; abravīt = told; śaṁsa = just tell; me = me; jīva = live; = die; = or; na = never [anymore]; mām = me; apahasiṣyasi = you should ridicule.

O queen, your mother then told your father Kekaya: Live or die, just tell me. You should never ridicule me [anymore].

Because Kaikeyī’s mother said, “Live or die,” it is understood that she had the nature of being a killer of her husband.