en_tn/deu/02/30.md

Moses continues to remind the people of what happened in the past.

hardened his mind and made his heart obstinate

Both of these phrases mean the same thing and are combined to emphasize that the God caused the king to be very stubborn. (See: rc://en/ta/man/translate/figs-parallelism)

to deliver up Sihon and his land before you

AT: "to give Sihon and his land over to you"