The prophet Jeremiah sent a letter from Jerusalem to the few surviving elders among the exiles, to the priests and the prophets, and to all the people Nebuchadnezzar had taken to Babylon from Jerusalem.
References for Jeremiah 29:1
The letter was sent after King Jeconiah, the queen mother, the court officials, the government leaders of Judah and Jerusalem, and the craftsmen and smiths had left Jerusalem.
It was delivered to Babylon by Elasah, Shaphan's son, and Gemariah, Hilkiah's son—two men dispatched to Babylon's King Nebuchadnezzar by King Zedekiah.
The LORD of heavenly forces, the God of Israel, proclaims to all the exiles I have carried off from Jerusalem to Babylon:
Build houses and settle down; cultivate gardens and eat what they produce.
Get married and have children; then help your sons find wives and your daughters find husbands in order that they too may have children. Increase in number there so that you don't dwindle away.
Promote the welfare of the city where I have sent you into exile. Pray to the LORD for it, because your future depends on its welfare.