And at that time I commanded you all the things you were to do.
Moses here reminds them of the happy constitution of their government, which was such as might make them all safe and easy if it was not their own fault. When good laws were given them good men were entrusted with the execution of them, which, as it was an instance of God's goodness to them, so it was of the care of Moses concerning them...
Commenting on Deuteronomy 1:9-18
And I commanded you at that time all the things which ye should do. Delivered to them all the laws, moral, ceremonial, and judicial, which were then given him at Mount Sinai. And I commanded you at that time all the things which ye should do. Delivered to them all the laws, moral, ceremonial, and judicial, which were then given him at Mount Sinai.
Deu 1:13-18 לכם הבוּ, give here, provide for yourselves. The congregation was to nominate, according to its tribes, wise, intelligent, and well-known men, whom Moses would appoint as heads, i.e., as judges, over the nation. At their installation he gave them the requisite instructions (Deu 1:16): “Ye shall hear between your brethren,” i.e., hear both parties as mediators, “and judge righteously, without respect of person.”...
Commenting on Deuteronomy 1:13-18