Zechariah turns to the angel to ask about the destination of the women carrying the measuring basket [מצודת ציון, ביאור שטיינזלץ]. The primary approach among commentators is that this basket symbolizes the punishment God decreed upon the nation. It reflects a divine standard of justice where the penalty corresponds exactly to the sin, measure for measure [אבן עזרא, מצודת דוד, מלבי״ם]. The detail that the women themselves are carrying the basket carries a deep meaning. It shows that their own wicked actions brought about this precise punishment. In essence, they are actively bringing about their own exile [רד״ק].
The prophet asks about the destination for a few connected reasons. He already understood that the figure trapped inside the basket represented the exile the nation had previously suffered. However, he did not fully grasp how the exact measure for measure punishment would play out, prompting him to ask where the basket was being taken [מצודת דוד]. His curiosity was further sparked by the sheer speed at which the women were moving [רד״ק]. Recognizing that this burden of punishment was being carried off to a foreign land, he needed to know its final resting place.
The destination is revealed to be the land of Shinar, or Babylon. This region is characterized by negative traits such as flattery and arrogance. Because of its corrupt nature, Babylon serves as the most natural and fitting environment for the basket of punishment to remain. This underlying spiritual reality also explains a historical outcome, as it clarifies why so many Jews chose to stay in Babylon rather than return to the Land of Israel during the era of the Second Temple [מלבי״ם].