Shiva Purana
शिवनिन्दारतं हत्वा पीडितः स्वयमेव वा ॥ यस्त्यजेद्दुस्त्यजान्प्राणान्न स भूयः प्रजायते ॥ ५३ ॥
After killing a person engaged in disparaging Śiva or being afflicted himself, if a devotee eschews his life, not ordinarily possible to forsake, he is not reborn.
english translation
zivanindArataM hatvA pIDitaH svayameva vA ॥ yastyajeddustyajAnprANAnna sa bhUyaH prajAyate ॥ 53 ॥
hk transliteration by Sanscript