Sforno on Deuteronomy 33:11/ספורנו על דברים ל״ג:י״א

1ברך ה' חילו, "please G’d bless their worldly activities," so that by making an easy livelihood they can devote themselves to instructing the people in your Torah.

2ופועל ידיו תרצה, may their Temple service find favour in Your eyes.

3מן יקומון. So that their enemies cannot rise against them with any chance of success. Moses referred to internal enemies, such as Korach and King Uzziah, both of whom challenged the exclusive and hereditary status of the Priests.