Three classes of ministering angels raise a song of praise every day. One class says, Holy! the second responds, Holy! and the third continues, Holy is the Lord of hosts! But in the presence of the Holy One — blessed be He! — Israel is more beloved than the ministering angels; for Israel reiterates the song every hour, while the ministering angels repeat it only once a day, some say once a week, others once a month, others once a year, others once in seven years, others once in a jubilee, and others only once in eternity.
Again, Israel mentions The Name after two words, as it is said (Deut. vi. 4), " Hear Israel, Yehovah," but the ministering angels do not mention The Name till after three, as it is written (Isa. vi. 3), " Holy! holy! holy! Yehovah Zebaoth." Moreover, the ministering angels do