Leviticus 26:41

so that I have remembered them adversely in the world, and brought them into captivity in the land of their enemies; behold, then will their proud heart have been broken, and they will make confession of their sins,

Even I… i.e., So have I done with them: I have punished them by bringing them into their enemies’ land, until their uncircumsized heart capitulated, as I shall further explain.

They shall repay their sin means, they shall make restitution, they will be punished for it [cf. comment on :34].

O’ (OR) THEN PERCHANCE THEIR UNCIRCUMCISED HEART BE HUMBLED. “[The word o here has the same meaning] as in ‘o’ (or) it is known that the ox was wont to gore. Another interpretation is [that the word o means] ‘perhaps’ — perhaps then their uncircumcised heart will be humbled; and they then be paid the punishment of their iniquity, meaning that they will achieve atonement for their iniquities through their sufferings.” This is Rashi’s language. The correct interpretation appears to me to be that He is stating: “And I will bring them into the land of their enemies, o (either) until such time when their uncircumcised heart will be humbled, o (or) until the time when they will have been paid the punishment of their iniquity by the length of the exile.”
Now it is after [the verse], and they shall confess their iniquity that He should have said, Then will I remember My covenant with Jacob etc., for what reason is there [to state here, between these two verses] and I will bring them into the lands of their enemies, since this is not a time when He would exile them and bring them into the lands of their enemies [since they have just confessed their sins]! Therefore Rabbi Abraham ibn Ezra interpreted [the verse to mean]: “This also I did with them, that I punished them by bringing them into the land of their enemies in order to humble their uncircumcised heart.” And He mentioned this here [in order to indicate] that they confessed their sin “because it was I Who brought this about, for even at the time that they became corrupted, My intent was that they should repent and confess.”
In my opinion He hints here [by placing the verses in this order] that [even] after the confession [of their sins], He will walk contrary to them and will still bring them into the land of their enemies until their uncircumcised heart is humbled, this being an allusion that He will bring them back into the Land but it will not be subdued before them; rather, they will have adversaries and enemies there, as it is said, And our adversaries said; And it came to pass when our enemies heard., Verse 9. The Land [at that time, when they returned from Babylon], was in the hands of foreign peoples, just as Ezra said in his prayer: Behold, we are servants this day, and as for the Land that Thou gavest unto our fathers to eat the fruit thereof and the good thereof, behold we are servants in it. And it yieldeth much increase unto the kings whom Thou hast set over us because of our sins; also they have power over us, and over our cattle, at their pleasure, and we are in great distress., 9:36-37.

והבאתי אותם בארץ אויביהם, when they return from exile to the land of Israel at the command of King Cyrus, the land of Israel remained under the political power of the gentiles. We know this from Nechemyah 9, 36-37 “Today we are slaves, and the land You gave our fathers to enjoy is fruit and bounty-here we are slaves on it! On account of our sins it yields its abundant crops to kings whom You have set over us.” They rule over our bodies and our beasts as they please, and we are in great distress.”

או אז יכנע לבבם הערל, “if then per chance their uncircumcised heart be humbled;” the Torah here refers to the desecration of the Sabbath by the people, (which is the seventh day of the week), or their failure to circumcise their sons on the eighth day after they had been born. [The numerical value of the letters in this words אז יכנע לבבם, in this verse would be equivalent to this interpretation.]