E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Ostrich Eggs in Churches.
Ostrich eggs are suspended in several Eastern churches as symbols of Gods watchful care. It is said that the ostrich hatches her eggs by gazing on them, and if she suspends her gaze even for a minute or so, the eggs are addled. Furthermore, we are told that if an egg is bad the
ostrich will break it: so will God deal with evil men.