Valmiki Ramayana 2.7.22

तव दुःखेन कैकेयि मम दुःखं महद्भवेत् ।त्वद्वृद्धौ मम वृद्धिश्च भवेदत्र न संशयः॥

tava duḥkhena kaikeyi mama duḥkhaṃ mahadbhavet |tvadvṛddhau mama vṛddhiśca bhavedatra na saṃśayaḥ ||

Our plain-language meaning of this verse is waiting for scholar review.