The LORD our God = Jehovah 'eloheinu. Two titles of later date do not occur in Deut.: "The LORD of hosts" (Samuel) and "the Holy Ono of Israel" (Isaiah).
spake. Jehovah spake only here to "us". His speaking to others, see Deu_2:1. Jehovah "said", See Deu_2:9. Jehovah "commanded", See Deu_4:14. Horeb. Twentieth day of second month. Num_10:11-13.