This means that they would not allow their sons and daughters to marry them. AT: "would not give our daughters to marry the people of the land or take their daughters to marry our sons" (See: [[rc://en/ta/man/translate/figs-explicit]])
# the people of the land
This refers to the people who live in their land who do not worship Yahweh. AT: "the people of this land who do not worship Yahweh" (See: [[rc://en/ta/man/translate/figs-explicit]])
# We promised ... we would not give ... we would not buy ... we will let ... we will cancel