The messengers of Ben-Hadad return to the king of Israel to escalate their demands for surrender. Following an initial agreement to submit, the envoys arrive to outline the practical realities of this capitulation and to set the stage for even harsher terms.
The primary shift in this exchange is moving from a general agreement of submission to an actual, physical transfer of wealth. Ben-Hadad makes it clear that his goal is not simply to establish his authority and ownership over the kingdom's assets, as that fact is already understood. Instead, he demands the immediate and practical surrender of the property directly into his control [מלבי״ם]. Furthermore, this demand strips away any remaining sense of autonomy. The king of Israel is warned that he cannot choose what to hand over or dictate the terms of the transfer based on his own discretion [ביאור שטיינזלץ].
Looking at the exchange from another perspective, this repeated demand acts as a stepping stone to a more severe situation. By reiterating the original terms, Ben-Hadad acknowledges that the initial property will indeed be surrendered as agreed. However, he uses this established agreement merely as a foundation to introduce a brand new and far more oppressive decree [רש״י].