Ramayana
यस्मान्न विद्यते हल्यं तेनाहल्येति विश्रुता । अहल्येति मया शक्र तस्या नाम प्रवर्तितम् ॥ 7-30-25 ॥
"Because no ugliness (halya) is found in her, therefore she is renowned as Ahalya; and thus the name Ahalya was given to her by me, O Shakra."
english translation