The book of Deuteronomy has as its main theme the covenant and its renewal. The unity of Israel is integral to the covenant relationship with God, and so the words of Moses are for all Israel.
The people hear these words beyond the region of the Jordan, in the land of Moab, though the specific location is uncertain.
1 Voici les paroles que Moïse adressa à tout Israël, de l'autre côté du Jourdain, dans le désert, dans la plaine, vis-à-vis de Suph, entre Paran, Tophel, Laban, Hatséroth et Di-Zahab.