Numbers 36:6-8

ASV_Strongs(i)
  6 H1697 This is the thing H3068 which Jehovah H6680 doth command H1323 concerning the daughters H6765 of Zelophehad, H559 saying, H802 Let them be married H5869 to whom they think H2896 best; H4940 only into the family H4294 of the tribe H1 of their father H802 shall they be married.
  7 H5159 So shall no inheritance H1121 of the children H3478 of Israel H5437 remove H4294 from tribe H4294 to tribe; H1121 for the children H3478 of Israel H1692 shall cleave H376 every one H5159 to the inheritance H4294 of the tribe H1 of his fathers.
  8 H1323 And every daughter, H3423 that possesseth H5159 an inheritance H4294 in any tribe H1121 of the children H3478 of Israel, H802 shall be wife H259 unto one H4940 of the family H4294 of the tribe H1 of her father, H1121 that the children H3478 of Israel H3423 may possess H376 every man H5159 the inheritance H1 of his fathers.