Midrash su Salmi 106:45

23. Another opinion. R' Elazar said: when Israel was redeemed from Egypt they were only redeemed from within these five things - suffering, repentance, the merit of the forefathers, mercy, and the end. From in the midst of suffering, as it is written "...and the children of Israel groaned..." (Exodus 2:23) From in the midst of repentance, as it is written "...and their cry rose up..." (ibid.) From in the midst of the merit of the forefathers, as it is written "And God remembered His covenant..." (Exodus 2:24) From in the midst of mercy, as it is written "And God saw the children of Israel..." (Exodus 2:25) From in the midst of the end, as it is written "...and God knew." (ibid.) And so too in the time to come they will only be redeemed from in the midst of these five things. From in the midst of suffering, as it is written "when you are in distress.." (Devarim 4:30) - behold, from in the midst of suffering. "...and you will return to the Lord your God..." (ibid.) Behold, from in the midst of repentance. "For the Lord your God is a compassionate God..." (Devarim 4:31) Behold, from in the midst of mercy. "He shall not forget the covenant which he made with your forefathers..." (Devarim 4:31) Behold, from in the midst of the merit of the forefathers. "...because all these things have befallen you in the end..." (Devarim 4:30) Behold, from in the midst of the end. And David explained them all. "When He saw that they were in distress..." (Psalms 106:44) Behold, from in the midst of suffering. "...when He heard their cry." (ibid.) Behold, from in the midst of repentance. "He recalled His covenant..." (Psalms 106:45) Behold, from in the midst of the merit of the forefathers. "And He made their captors kindly disposed toward them." (Psalms 106:46) Behold, from in the midst of mercy. "Deliver us, oh Lord God, and gather us from among the nations..." (Psalms 106:47) Behold, from in the midst of the end.