Canto 2 -
Ayodhyā-kāṇḍa
Chapter 20: Kausalyā’s Lamentation
Text 2.20.49

स्थिरं तु हृदयं मन्ये ममेदं यन्न दीयते।
प्रावृषीव महानद्याः स्पृष्टं कूलं नवाम्भसा॥

sthiraṁ tu hṛdayaṁ manye mamedaṁ yan na dīyate
prāvṛṣīva mahā-nadyāḥ spṛṣṭaṁ kūlaṁ navāmbhasā

sthiram tu = steady; hṛdayam = heart; manye = I think that; mama = my; idam yat = which; na = not; dīyate = does tear apart; prāvṛṣi = during the rainy season; iva = is like; mahā-nadyāḥ = of a great river; spṛṣṭam = touched; kūlam = the bank; nava-ambhasā = by the fresh waters.

I think that my steady heart which does not tear apart is like the bank touched by the fresh waters of a great river during the rainy season.