Ruling on Marriage to Relatives

The questioner (Ahmad A. A.) says: We have heard, O Shaykh, that there is a concern regarding marriage to relatives. I want to marry off one of my sons, so is there a hadith regarding this? May Allah reward you with good.
Answer: No, there is no concern in it. What he said is wrong. There is no concern in marriage to relatives; rather, it is good. The Prophet (peace and blessings be upon him) married from among his relatives. Umm Salama was from among his relatives, Aisha was from among his relatives, and Umm Habiba was from among his relatives. They were all from Quraysh, all from his community (peace and blessings be upon him). There is no harm in that. 'Ali married Fatima, the daughter of the Prophet (peace and blessings be upon him), and she was the daughter of his maternal uncle (peace and blessings be upon him). And 'Uthman married the daughter of the Prophet (peace and blessings be upon him); he married his two daughters, Ruqayyah and Umm Kulthum. And Abu al-'As ibn al-Rabi' married the fourth daughter of the Prophet (peace and blessings be upon him), Zaynab. They were all maternal uncles. There is no harm in this. Yes.
The presenter: May Allah reward you with good, Your Eminence.