Tobit 4:12

12 "Son, be on your guard against prostitutes. Above all, marry a woman of our tribe, because we are descendants of the prophets. Do not marry anyone who is not related to us. Remember that Noah, Abraham, Isaac and Jacob, our earliest ancestors, all married relatives. God blessed them with children, and so their descendants will inherit the land of Israel.

Tobit 4:12 In-Context

10 Taking care of the poor is the kind of offering that pleases God in heaven. Do this, and you will be kept safe from the dark world of the dead.

12 "Son, be on your guard against prostitutes. Above all, marry a woman of our tribe, because we are descendants of the prophets. Do not marry anyone who is not related to us. Remember that Noah, Abraham, Isaac and Jacob, our earliest ancestors, all married relatives. God blessed them with children, and so their descendants will inherit the land of Israel.

13 Son, be loyal to your own relatives. Don't be too proud to marry one of them. Such pride leads to terrible frustration and ruin, just as laziness brings on severe poverty and causes starvation.

14 "Pay your workers each day; never keep back their wages overnight. Honor God in this way, and he will reward you. Behave properly at all times.