Surah 4:14
"But whoever disobeys God and His messenger, and transgresses His limits – He will cause him to enter the Fire, there to remain. For him (there is) a humiliating punishment."
4.14 â But whoever disobeys God and His messenger, and transgresses His limits
This was one of the verses that the brilliant jurist al-ShÄfiâÄ« (d. 820) cited to support the authority of the sunna (the life example and sayings attributed to Muhammad). Al-ShÄfiâÄ«âs influential arguments guaranteed the importance of Muhammad as a source of Islamic Law.
- from The Quran with Christian Commentary: A Guide to Understanding the Scripture of Islam