Surah 21:28
"He knows what is before them and what is behind them, and they do not intercede, except for the one whom He approves, and they are apprehensive because of fear of Him."
– they do not intercede, except for the one whom He approves
Intercession between humans and Allah is generally denied in the Quran, but this verse leaves open the possibility that Allah may approve someone for this role. See the analysis of verses on intercession at 39.44.
- from The Quran with Christian Commentary: A Guide to Understanding the Scripture of Islam