Then Jeremiah the prophet said to them, "I have heard. Indeed, I will pray to the LORD your God according to your words, and it shall be, that whatever the LORD answers you, I will declare it to you. I will keep nothing back from you."
Jeremiah 42:4
Surrounding context
42:3 that the LORD your God may show us the way in which we should walk and the thing we should do."
42:4 Then Jeremiah the prophet said to them, "I have heard. Indeed, I will pray to the LORD your God according to your words, and it shall be, that whatever the LORD answers you, I will declare it to you. I will keep nothing back from you."
42:5 So they said to Jeremiah, "Let the LORD be a true and faithful witness between us, if we do not do according to everything which the LORD your God sends us by you.