Midras Ratapan 5:21: Midrash Tehillim & Eikhah Rabbah

"In peace together." Israel said, "All the prophets are united in my peace." Rabbi said, "All the prophets open with rebukes and end with consolations." Rabbi Eliezer said, "All the prophets open with rebukes and end with consolations, except for Jeremiah, who ended with rebukes." As it is written, "Thus you shall sink into Babylon, and there you shall remain" (Jeremiah 51:64). Rabbi Yochanan said to him, "Jeremiah also ended with consolations, for he saw the destruction of the Temple and prophesied about it. He ended with, 'Thus far are the words of Jeremiah'" (Jeremiah 51:64). He did not end with rebukes about the destruction of the Temple. And it is written, "And they shall be an abhorring to all flesh" (Isaiah 66:24). This refers to the gentiles. And it is written, "For you have rejected us and have become angry with us" (Lamentations 5:22). "Bring us back to You, O Lord, and we shall return; renew our days as of old" (Lamentations 5:21). At that time, You will lead me securely.

“Return us to You, Lord, and we will return; renew our days as of old” (Lamentations 5:21).
“Return us to You, Lord, and we will return.” The congregation of Israel said before the Holy One blessed be He: ‘Master of the universe, it is incumbent upon You to return us.’ He said to them: ‘It is incumbent upon you, as it is stated: “Return to Me and I will return to you, said the Lord” (Malachi 3:7).’ It said before Him: ‘Master of the universe, it is incumbent upon you, as it is stated: “Return us, God of our salvation” (Psalms 85:5).’ That is why it is stated: “Return us to You, Lord, and we will return.”
“Renew our days as of old [kekedem].” Like Adam the first man, just as it says: “He banished the man; He stationed…east [mikedem] of the Garden of Eden” (Genesis 3:24).²⁸Adam repented after being banished from Eden, and his repentance was accepted (Rabbi David Luria). Alternatively, “renew our days as of old.” Just as it says: “The offering of Judah and Jerusalem will be pleasant to the Lord, as in the days of old and as in former years” (Malachi 3:4). “As in the days of old,” this is Moses, as it is written: “He remembered the days of old, Moses, His people” (Isaiah 63:11). “And as in former years,” like the years of Solomon. Rabbi [Yehuda HaNasi] says: “As in the days [kimei] of old,” as in the days of Noah, as it is stated: “For, like the waters of [ki mei] Noah, this is for Me” (Isaiah 54:9). “And as in former years,” like the years of Abel, when there was not yet idolatry in the world.

"My soul has pined for Your salvation" (Psalms 119:81), as Jeremiah said, "Why do You forget us forever?" (Lamentations 5:20), "You have spurned us and rejected us," but "Restore us to Yourself" (Lamentations 5:21). Similarly, it is said, "The harvest has passed, the summer has ended, and we are not saved" (Jeremiah 8:20), and David said, "How long, O Lord? Will You forget me forever?" (Psalms 13:2) and "You, O Lord, have knowledge; remember me and take note of me; avenge me of my persecutors. Do not, because of Your patience, lead me to disillusionment. Take note that I suffer disgrace for Your sake" (Jeremiah 15:15). You are patient, but our spirit is weak, and the longer You wait, the more our souls are consumed. Therefore, it is said, "My soul has pined for Your salvation." "My eyes fail from searching Your word, saying, 'When will You comfort me?'" (Psalms 119:82). Why did my eyes fail? Concerning this, it is written, "For a set time, an appointed time; though it tarries, wait for it, for it will surely come, it will not delay" (Habakkuk 2:3). The appointed times have passed, yet You have not comforted me. Therefore, it is said, "When will You comfort me?" "For I am like smoke, long neglected" (Psalms 119:83). However, Daniel said, "Many shall purify themselves and be cleansed and refined; the wicked shall act wickedly and none of the wicked shall understand, but the wise shall understand" (Daniel 12:10). We have already been refined and cleansed; we have already endured all manner of affliction, as it is said, "For I am like smoke, long neglected." There is no greater refinement than death, as it is said, "How many are the days of Your servant?" (Psalms 119:84). Even though You brought Israel out of Egypt, we fear that they will be subjugated in the midst of the building. If it is Your will, do for us as it is said, "Make known among the nations in our sight" (Psalms 79:10). The Holy One, Blessed be He, said to them, "You ask Me to act, and I shall indeed act, as it is said, 'I will repay Babylon and all the inhabitants of Chaldea for all the evil they have done to Zion in your sight'" (Jeremiah 51:24). "The wicked have dug pits for me" (Psalms 119:85). Israel said to the Holy One, Blessed be He, "The wicked have not dug one pit for me, but many." It is written in the Torah, "You shall not slaughter it and its young both in one day" (Leviticus 22:28), and concerning me it is written, "Upon the iniquity of their fathers they will stumble" (Hosea 10:14). It is written in the Torah, "He shall pour out its blood" (Leviticus 17:13), and concerning me it is written, "I have been poured out like water" (Psalms 22:15).