Gregory the Dialogist

But because in certain passages of Scripture we have learned that some things are done through the cherubim, and other things through the seraphim, whether they do these things by themselves, or whether they are done through the hosts subject to them, which, as is said, receive the names of the greater ones because they come from the greater ones, we do not wish to affirm what we do not prove by clear testimonies. …

40 Homilies on the Gospels, Homily 34 ↗