Albert Barnes Commentary Deuteronomy 1:37

"Also Jehovah was angry with me for your sakes, saying, Thou also shalt not go in thither:" — Deuteronomy 1:37 (ASV)

The sentence on Moses was not passed when the people rebelled during their first encampment at Kadesh, but some 37 years later, when they had re-assembled in the same neighborhood at Meribah (see the note on Numbers 20:13). He alludes to it here as having happened not many months previously, bearing on the facts which were for his purpose in pricking the conscience of the people.