(Devarim 33:1) "And this is the blessing wherewith Moses, the man of G-d, blessed the children of Israel before his death:" (Devarim 33:1) "And this is the blessing": Because Moses had first spoken to Israel hard words — (Ibid. 32:24-25) (They will be) "hairy with hunger and embattled by demons… On the outside (of the city) the sword (of legions) shall devour (them), and in the chambers (of their hearts, when they flee), fright" (will pound, eventually killing them), (Ibid. 9:8) "And in Chorev you angered the L-rd," (Ibid. 7) "You have been rebellious…" — he reverted to words of consolation, viz.:
Moses Blesses Israel on the Cusp of His Own Death
Sifrei Devarim 342:1