Canto 2 -
Ayodhyā-kāṇḍa
Chapter 20: Kausalyā’s Lamentation
Text 2.20.53

यदि ह्यकाले मरणं स्वयेच्छया लभेत कश्चिद्गुरुदुःखकर्शितः।
गताहमद्यैव परेतसंसदं विना त्वया धेनुरिवात्मजेन वै।।

yadi hy akāle maraṇaṁ svayecchayā
labheta kaścid guru-duḥkha-karśitaḥ
gatāham adyaiva pareta-saṁsadaṁ
vinā tvayā dhenur ivātmajena vai

i

yadi hi = if; akāle = even before he is to die; maraṇam = death; svayā = by his; icchayā = wish; labheta = could attain; kaścit = one; guru-duḥkha-karśitaḥ = tormented by extreme sorrow; gatā = would go; aham = I; adya eva = today itself; pareta-saṁsadam = to the abode of Yamarāja; vinā = without; tvayā = You; dhenuḥ = a cow; iva = like; ātmajena vai = [without] its calf.

If one tormented by extreme sorrow could attain death by his wish, even before he is to die, I would go today itself to the abode of Yamarāja without You, like a cow [without] its calf.

This explains her earlier statement, “And certainly there is no untimely death for me!”