Jeremiah 29:12
11 For I know what I have planned for you,’ says the Lord. ‘I have plans to prosper you, not to harm you. I have plans to give you a future filled with hope. 12 When you call out to me and come to me in prayer, I will hear your prayers. 13 When you seek me in prayer and worship, you will find me available to you. If you seek me with all your heart and soul, 14 I will make myself available to you,’ says the Lord. ‘Then I will reverse your plight and will regather you from all the nations and all the places where I have exiled you,’ says the Lord. ‘I will bring you back to the place from which I exiled you.’ 15 “You say, ‘The Lord has raised up prophets of good news for us here in Babylon.’
Daniel 9:3
1 In the first year of Darius son of Ahasuerus, who was of Median descent and who had been appointed king over the Babylonian empire— 2 in the first year of his reign I, Daniel, came to understand from the sacred books that the number of years for the fulfilling of the desolation of Jerusalem, which had come as the Lord’s message to the prophet Jeremiah, would be 70 years. 3 So I turned my attention to the Lord God to implore him by prayer and requests, with fasting, sackcloth, and ashes. 4 I prayed to the Lord my God, confessing in this way: “O Lord, great and awesome God who is faithful to his covenant with those who love him and keep his commandments, 5 we have sinned! We have done what is wrong and wicked; we have rebelled by turning away from your commandments and standards.
Notes and References
"... These letters refer to the seventy-year period mentioned in Daniel 9:2; in contrast with the passages in Jeremiah, the reference to seventy years in Daniel 9 refers to the destruction of Jerusalem. The multiple letters or scrolls that Jeremiah sent to the exiles explains the plural form of a specific noun ... the next verse (verse 3) describes Daniel’s actions upon reading these documents ... Why does Daniel pray at this stage? According to Jeremiah 29:12–14, at the conclusion of the 70-year period, the exiles should turn towards God in prayer, in response to which He will rescue them and bring them back to the Land (The formulation of this passage shows clear Deuteronomistic language. Jeremiah 29:13 is nearly identical to Deuteronomy 4:29, and they both reflect a similar exilic setting) ..."
Segal, Michael The Chronological Conception of the Persian Period in Daniel 9 (pp. 283-303) Journal of Ancient Judaism, Vol. 2, 2011