Bless the Lord, ye his angels (comp. Psalms 148:2). That excel in strength. The angels that "excel in strength"—literally, are mighty in strength—may best be understood as those called in the New Testament "archangels" (1 Thessalonians 4:16; Jud 1 Thessalonians 1:9), the highest of the glorious beings that stand around the throne of God (Revelation 8:2, Revelation 8:6; Revelation 10:1) and execute his behests.
These are they that, in an especial sense, do his commandments, hearkening unto the voice of his word.