The ruling on a man not marrying except from his own tribe

Question:
I said: O Shaykh, may Allah reward you for your kindness. Among the customs of some of the wicked and the worthless is that they do not marry except from their own people. From their tribe, or as they say, from one who is of their tribe. Is this one of the matters of the pre-Islamic age of ignorance that has been negated?

Answer:
As for the fact that they do not marry except from one who is of their tribe, this is not correct. The Prophet (peace and blessings be upon him) said: regarding his religion and his trustworthiness, then marry him. If you do not, there will be a fitnah (trial, discord or temptation) on the earth. So ask about it, whether he is from their tribe or from another tribe. As for the issue of difference in lineage, this is a tribal matter. Here, they do not marry except a tribal one. This is part of kafa'ah (suitability in marriage), which the scholars have counted among the conditions of kafa'ah. If the woman is pleased with him and the wali (guardian) is pleased with him, there is no harm. But if they are not pleased, then this is considered part of kafa'ah.