Jonathan is true to his word and delivers a faithful account of Saul’s reaction. The signal is given and the message is that Saul has indeed reacted badly as David feared he would.
God's messenger to David in this particular chapter is Jonathan himself. In verses 41-42, you see the great comfort which Jonathan extends to David, and what a great strength and help it is to David. That is quite right too. David comes near to breaking point and Christian fellowship comes in. Christian fellowship and friendship are used in this particular chapter by the Lord, to strengthen David, and it helps him enormously. It is a token of the Lord’s love for us that there are fellow believers on earth who care for us and would render much help to us. Even though David was to be parted from Jonathan, it would still comfort him greatly to know that there was loyal affection in Jonathan’s heart. Jonathan of course had to return to his father; he could not be expected to openly rebel against him; he had certain duties to perform in spite of his father’s evil behaviour. But secretly he was bound to David. They both wept, but David wept more. They were both clear that he was the Lord himself who was the bond between them. Their covenant had been made before him, and they knew that not even death would separate them, for believers anticipate an eternal friendship together in the resurrection. They must both wait for the Lord to bring about his will in his own way. Jonathan would die on the battlefield with his father, and the Lord would take his faithful servant to himself.