Jeremiah 38:6 "They took Jeremiah and cast him into the cistern of Malchiah the king’s son, which was in the court of the guardhouse; and they let Jeremiah down with ropes. Now in the cistern there was no water but only mud, and Jeremiah sank into the mud. But Ebed-melech the Ethiopian, a eunuch, while he was in the king’s palace, heard that they had put Jeremiah into the cistern.
Jeremiah 38:15 "Then Jeremiah said to Zedekiah, “If I tell you, will you not certainly put me to death? Besides, if I give you advice, you will not listen to me. But King Zedekiah swore to Jeremiah insecret saying, “As the Lord lives, who made this life for us, surely I will not put you to death nor will I give you over to the hand of these men who are seeking your life.”