If you are looking for a "piece" related to this, you are likely referring to one of the following: The Book Itself
The phrase is often uttered when someone narrowly avoids an accident or receives unexpectedly good news. dus iz neis
"Grandpa... what is this?" Avrum asked, recoiling slightly. "Did these go bad?" If you are looking for a "piece" related
"What's in this?" Avrum asked, coughing as he wiped the dust off the lid. dus iz neis