Amud 22b

Like sort of a Choimer - כמין חומר

Summary:
חומר can mean a string of pearls or spices, or it can mean deeds.

Why is the ear different - מה נשתנה אזן

Summary::
We bore (only) an עבד with a מרצע for its גימטריא of four hundred is the amount of years the בנ"י were עבדים.