Canto 2 -
Ayodhyā-kāṇḍa
Chapter 64: Daśaratha Gives up his Life in Remembrance of Lord Rāma
Text 2.64.74

कौसल्ये चित्तमोहेन हृदयं सीदतीव मे।
वेदये न च संयुक्ताञ्शब्दस्पर्शरसानहम्॥

kausalye citta-mohena hṛdayaṁ sīdatīva me
vedaye na ca saṁyuktāñ śabda-sparśa-rasān aham

kausalye = Kausalyā; citta-mohena = because of my mental perplexity; hṛdayam = heart; sīdatī iva = seems to shatter; me = my; vedaye na = cannot experience; ca = and; saṁyuktān = the sensations; śabda-sparśa-rasān = of sound, touch and taste; aham = I.

Kausalyā, my heart seems to shatter because of my mental perplexity and I cannot experience the sensations of sound, touch and taste.

Mental perplexity refers to fainting because of excessive anxiety 8. The mind resides in the heart.