only to the family
Numbers 36:12
[to men] of the families of the sons of Manasseh, son of Joseph, they have been for wives, and their inheritance is with the tribe of the family of their father.
Genesis 24:3
and I cause thee to swear by Jehovah, God of the heavens, and God of the earth, that thou dost not take a wife for my son from the daughters of the Canaanite, in the midst of whom I am dwelling;
Genesis 24:57
and they say, 'Let us call for the young person, and ask at her mouth;'
Genesis 24:58
and they call for Rebekah, and say unto her, 'Dost thou go with this man?' and she saith, 'I go.'
2 Corinthians 6:14
Become not yoked with others -- unbelievers, for what partaking [is there] to righteousness and lawlessness?