And they said, The LORD commanded my lord to give the land for an inheritance by lot to the children of Israel: and my lord was commanded by the LORD to give the inheritance of Zelophehad our brother unto his daughters.
Our brother - Our kinsman.
 This is the thing which the LORD doth command concerning the daughters of Zelophehad, saying, Let them marry to whom they think best; only to the family of the tribe of their father shall they marry.
To the family — They seem hereby to he confined not only to the same tribe, but also to the family of their tribe, as appears from the reason of the law, for God would have the inheritance of families as well as tribes kept entire and unmixed.
 And every daughter, that possesseth an inheritance in any tribe of the children of Israel, shall be wife unto one of the family of the tribe of her father, that the children of Israel may enjoy every man the inheritance of his fathers.
The inheritance of his fathers — This law was not general to forbid every woman to marry into another tribe, as may be reasonably concluded from the practice of so many patriarchs, kings, priests, and other holy men, who have married women of other tribes, yea sometimes of other nations, but restrained to heiresses, or such as were likely to be so. But if they had brethren, they were free to marry into any tribe, yet so that, if their brethren died, the inheritance went from them to the next a-kin of their father's tribe and family. And the principal reason why God was solicitous to preserve tribes and families unmixed was, that the tribe and family too, out of which the Messiah was to come, and by which he should be known, might be evident and unquestionable.