Ezra 9:11

Which thou hast commanded by thy servants the prophets
Moses, and Joshua, and others, see ( Deuteronomy 7:3 ) ( Joshua 23:12 ) ( Judges 2:2 )

saying, the land, unto which ye go to possess it;
meaning the land of Canaan:

is an unclean land with the filthiness of the people of the lands,
with their abominations, which have filled it from one end to another
with their uncleanness;
which is to be understood not of their idolatries only, but of their incestuous marriages, and impure copulations, on which account the Lord spewed out the old inhabitants of it; for which reason the Jews ought to have been careful not to have defiled it again by similar practices; see ( Leviticus 18:1-30 ) .