There is disagreement among modern Islamic thinkers as to the applicability of stoning for adultery. While religious texts often give examples both with and without stoning, the Quran does not prescribe stoning as a punishment for any crime, mentioning only lashing as punishment for adultery. However most scholars maintain that there is sufficient evidence from hadiths to derive a ruling. The vast majority of Muslims consider hadiths, which describe the words, conduct and example set by Muhammad during his life, as a source of law and religious authority second only to the Quran. They consider sahih hadiths to be a valid source of Sharia, justifying their belief on Quranic verse 33.21, and other verses.