Valmiki Ramayana Bala Kanda Sarga 48 Shloka 17
Original Shlokaतस्यान्तरं विदित्वा तु सहस्राक्षश्शचीपति:।।1.48.17।। मुनिवेषधरोऽहल्यामिदं वचनमब्रवीत्।
1 source checked for this shloka
शचीपति: consort of Sachi, सहस्राक्ष: Indra, तस्य his, अन्तरम् opportunity, विदित्वा having found, मुनिवेषधर: assuming the disguise of ascetic, अहल्याम् addressing Ahalya, इदम् वचनम् these words, अब्रवीत् said.
The thousandeyed Indra, consort of Sachi, having found an opportunity (during the absence of the ascetic), assumed the guise of the ascetic (Gautama) and said to Ahalya: