Valmiki Ramayana Ayodhya Kanda Sarga 75 Shloka 61
Original Shlokaमम दुःखमिदं पुत्र भूयस्समुपजायते। शपथै श्शपमानो हि प्राणानुपरुणत्सि मे।।2.75.61।।
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पुत्र son, मम to me, इदं दुःखम् this suffering, भूयः still more, समुपजायते is growing, शपथैः by oaths, शपमानः swearing, मे my, प्राणान् life, उपरुणत्सि हि you are obstructing (choking).
O son by swearing on oaths, you are choking the very breath of my life and my suffering has grown still more.