God's profound love and watchful care over the people of Israel is so immense that He is willing to allow other nations to face harsh consequences in order to ensure Israel's survival. God presents Himself as the exclusive Father and Savior of the nation, reflecting the different ways He steps in to protect them [רד״ק, שד״ל]. On one level, He provides general guidance and natural protection. On a deeper level, He offers a special, miraculous intervention that defies the laws of nature, a protection granted to Israel because of the holiness of their actions [מלבי״ם].
To save His people, God treats other nations as a ransom and a substitute, allowing them to absorb the punishment meant for Israel [מצודת ציון, שטיינזלץ]. This substitution takes two distinct forms. Sometimes, it functions as an unequal trade, much like paying a financial ransom to avoid physical captivity. At other times, it is an exact exchange, a life for a life, stepping in to rescue Israel from complete destruction [מלבי״ם].
Commentators explore different historical moments where this dynamic unfolded. One perspective traces this back to the Exodus from Egypt. During the plague of the firstborn and the subsequent destruction of the Egyptians, Egypt served as the ultimate ransom. Even though the Israelites themselves might have been worthy of destruction at that time, God redirected His anger toward Egypt to rescue His firstborn nation [רש״י, מצודת דוד].
The primary approach among commentators points to a later event: the miraculous rescue of Jerusalem from Sennacherib, the king of Assyria. As Sennacherib marched to destroy Judah, he received word that the powerful empires of Cush, Seba, and Egypt were mobilizing against him. Diverting his path, he engaged these mighty nations first, taking vast amounts of captives and spoils before finally turning his attention to Jerusalem. God orchestrated this to show Sennacherib that while he could effortlessly crush massive empires, he was entirely powerless against Israel, even though they were small and weak. Those foreign empires absorbed the initial blow, acting as the ransom that saved Israel from death and exile [רד״ק, מצודת דוד, מלבי״ם, צאינה וראינה].
Other historical interpretations suggest this substitution refers to the era of the Median kings, who would bring harm to Egypt rather than Israel [אבן עזרא]. Looking beyond the past, some view this as a prophecy for the Messianic era, a future time when foreign kings will clash, and nations like Egypt, Cush, and Seba will suffer severe defeats before God ultimately delivers Israel [רד״ק, צאינה וראינה].
Finally, a purely conceptual approach suggests that these events are not meant to be tied to a specific historical timeline at all. Instead, they serve as a vivid expression of God's boundless love. It is as if God is declaring that if He ever needed to pay a ransom for Israel, He would willingly hand over the greatest and wealthiest nations in their place, simply because Israel is so precious to Him [שד״ל].