Valmiki Ramayana Ayodhya Kanda Sarga 64 Shloka 17
Original Shlokaभगवच्छशब्दमालक्ष्य मया गजजिघांसुना। विसृप्टोऽम्भसि नाराचस्तेन ते निहतस्सुतः।।2.64.17।।
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भगवन् O venerable one, शब्दम् sound, आलक्ष्य aiming at, गजजिघांसुना intending to kill an elephant, मया by me, अम्भसि in the water, नाराचः with an arrow, विसृष्टः has been released, तेन by that, ते your, सुतः son, निहतः was struck.
O venerable one I released an arrow towards the water aiming at the sound intending to kill an elephant but it hit your son.