Easton's Bible Dictionary
They are supposed to represent mercy, as distinguished from justice, mercy in its various instrumentalities, and especially as connected with the throne of God, the "throne of grace."
These dictionary topics are from M.G. Easton M.A., D.D., Illustrated Bible Dictionary, Third Edition, published by Thomas Nelson, 1897. Public Domain.
Easton, Matthew George. Entry for 'Living Creatures'. Easton's Bible Dictionary. https://www.studylight.org/dictionaries/eng/ebd/l/living-creatures.html. 1897.