Valmiki Ramayana Aranya Kanda Sarga 71 Shloka 29
Original Shlokaविज्ञानं हि मम भ्रष्टं शापदोषेण राघव।।3.71.29।। स्वकृतेन मया प्राप्तं रूपं लोकविगर्हितम्।
1 source checked for this shloka
राघव Rama, शापदोषेण due to the curse, मम my, विज्ञानम् wisdom, भ्रष्टं हि is indeed lost, मया by me, स्वकृतेन by my own deed, लोकविगर्हितम् a form despised by the world, रूपम् this form, प्राप्तम् is attained.
O Rama due to the curse I have lost my wisdom. By my own deed, I have attained this form despicable to the world.