John Calvin's Bible Commentary
Jeremiah 39:15
The Prophet tells us here that God was not unmindful of that Ethiopian, by whom he had been preserved, though he was an alien and from a barbarous nation. We have seen, however, that he alone undertook the cause of the Prophet, when others, being terrified by fear, did not exert themselves, or were avowedly enemies to God’s servant. Ebedmelech then alone dared to go forth in a case so hopeless, and undertook the defense of the holy man. The Prophet says now that this service was so acceptable, that it would not be without its reward. We have said that Ebedmelech had thus manifested his concern for the Prophet’s life, but not without evident danger; for he knew that the princes were united against him, and that these ungodly men had drawn to their side the greatest part of the court and also of the common people. Then Ebedmelech roused against himself both high and low; but God aided him, so that he was not overpowered by his adversaries. In his very danger he experienced the favor of God, and was protected and delivered from danger.
But now he finds that he had not ill employed his exertions; for he had not only been humane and merciful towards a mortal man, but had also done service for God; for whatever we do for God’s servants, he acknowledges as done to himself, and will have it to be laid to his account, according to what Christ says,
“He who gives a cup of cold water to one of the least of my disciples, shall not lose his reward.” (Matthew 10:42)
There is then no doubt but that the Spirit of God intended by the example of Ebedmelech to rouse us to the duties of humanity, even to teach us to sue-coup the miserable, and to give them help as far as we can, and not to shun the hatred of men or any dangers, which we may thereby incur. And as we are torpid and negligent in doing good, the reward given to the Ethiopian is set before us, so that we may know, that though nothing is to be hoped from men, when we are kind and liberal, yet we shall not lose our labor, for God is rich enough, who can render to us more than can be expected from the whole world. This then is the lesson conveyed here.
But the circumstances must be noticed: the Prophet says, that he was commanded to promise deliverance to Ebedme-lech, while he was yet confined in prison. This, at the first view, seems strange; for the Prophet might have objected and said, “Thou biddest me to go forth; why, then, are not the gates of the prison opened for me? and then thou wouldst have me to be the herald of thy favor; but my present miserable condition will prevent any credit to be given to my words: for how can Ebedmelech believe that I have been sent. by thee? for I am here confined and surrounded by many deaths.” But let us hence learn not to bring down God’s word to our judgment, when anything is promised beyond our expectation, and all our conceptions. Though, indeed, God seemed, as it were, to mock his servant, when he ordered him, a prisoner, to go to Ebedmelech; and yet the Prophet received and embraced this command, and performed it, no doubt, though this is not expressly mentioned.
This is the reason why he says, that a word came to him from Jehovah, while he was in the court of the prison