Jer 29:10-14

10For thus says the Lord: Only when Babylon's seventy years are completed will I visit you, and I will fulfill to you my promise and bring you back to this place.11For surely I know the plans I have for you, says the Lord, plans for your welfare and not for harm, to give you a future with hope.12Then when you call upon me and come and pray to me, I will hear you.13When you search for me, you will find me; if you seek me with all your heart,14I will let you find me, says the Lord, and I will restore your fortunes and gather you from all the nations and all the places where I have driven you, says the Lord, and I will bring you back to the place from which I sent you into exile.