Deuteronomy 27:9

This day. That is, the day of Moses’ final address to the people. As they entered upon their inheritance God confirmed the covenant made with their fathers (see ch. 26:18). The entrance into the Land of Promise became an appropriate occasion for a restatement of the provisions of the covenant. God was about to fulfill His covenant promise — the gift of Canaan — and Israel could not afford to forget their promise to obey Him, lest they forfeit the land of inheritance. It is probable that the “elders” (v. 1) were stationed at strategic points throughout the camp to relay the words of Moses to the vast throng. This renewal of the covenant seems to have almost equaled in impressiveness the ratification of the covenant at Sinai. At Sinai most of the adults who now took part in this ceremony of rededication had either been children, or were not yet born.