Valmiki Ramayana Aranya Kanda Sarga 68 Shloka 25
Original Shlokaसीताहरणजं दुःखं न मे सौम्य तथाविधम्।।3.68.25।। यथा विनाशे गृध्रस्य मत्कृते च परन्तप।
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परन्तप O scorcher of enemies, सौम्य handsome one, गृध्रस्य bird's, विनाशे at his death, मत्कृते च for my sake, यथा as, सीताहरणजम् caused by the abduction of Sita, दुःखम् grief, तथाविधम् in that way, न not experienced.
O scorcher of enemies, O handsome Lakshmana the grief I experience due to Jatayu's death on my account is more intense than Sita's abduction.