Question: Is there scripture or command found in Torah which forbids marrying out of each tribe? In other words, could the daughters/sons of the tribe of Judah marry someone from any of the other tribes? How would they know this in modern times?

Answer: Towards the end of the Book of Numbers you will find the account of the daughters of Tzlofchad. Because they had no brothers, they were to inherit their father’s portion in Israel. Moshe then cautions them to marry cousins from the same tribe in order to keep the tribe’s portions intact. This requirement to only marry within the tribe was only in place for the first generation that actually divided up the land. Later generations were free to marry any Jew from any tribe as is the practice today.

All the Best,
Rabbi Azriel Schrieber