Gemara:

Sotah 

Collections: Mesechta Sota

References: Sotah: 5A  

Description

A major discussion of the most undesirable trait of arrogance. Whether it is a formal issur or a matter of midos it is clearly viewed as a major issue. The possible exception, in 1/64 measure for a Talmid Chacham, notably rejected by the Rambam.