1 Samuel 19:20

Now, it seems to me that fortuitous circumstance also is sometimes the cause of prophesying, as is true in the present case of Caiaphas. He was high priest of that year [in which] Jesus was to die for the people that the whole nation might not perish. For although others were high priests … no one prophesies except the high priest of the year in which Jesus was to suffer.And it was fortuitous circumstance that caused the messengers of Saul to prophesy when they were sent to David, along with Saul himself. For it is as if the fact that they were seeking David became the cause of their prophecy, such as it was, as has been recorded.

The book of Kings [Samuel] gives us an example about prophecy. Saul was the persecutor of David. When he was persecuting him, he sent guards to drag him away to punishment, and those who were sent to bring David to be slain found him among the prophets; and Samuel was there too.… So he had fled to the place where besides Samuel, the most distinguished of all the prophets, there were also many other prophets. Pushing their way among them, while they were prophesying, came the emissaries of Saul, to drag him off, as I said, to death. The spirit of God leaped upon them and they began to prophesy, having come to lead a holy and just man of God to the execution block and snatch him away from among the prophets. They were suddenly filled with the spirit of God and turned into prophets. It's possible this happened because of their innocence; after all, they hadn't come of their own accord to arrest him but had been sent by their king. And perhaps they had indeed come to the place where David was but weren't going to do what Saul had told them to; perhaps they too were intending to stay there. Because such things even happen today. Sometimes a bailiff is sent by high authority to drag somebody out of the church; he dare not act against God, and in order not to face execution himself he stays there, in the place he was sent, to haul someone out of it. So you could say, pleasantly surprised and relieved, that these men suddenly became prophets because they were innocent; the very gift of prophecy bore witness to their innocence. They came because they were sent, but they weren't going to do what that bad man had told them to. Let us believe that about them.Others were sent; the Spirit of God leaped on them too, and they too began to prophesy. Let's count them too with the first lot as being quite innocent. A third lot were sent; the same happened to them too; let them all be innocent. When they delayed and what Saul had ordered wasn't done, he came himself. Was he too innocent? Was he also sent by some authority, and not ill-intentioned of his own free will? Yet the Spirit of God leaped on him too, and he began to prophesy. There you are, Saul is prophesying, he has the gift of prophecy, but he has not got charity. He has become a kind of instrument to be touched by the Spirit, not one to be cleansed by the Spirit. The Spirit of God, you see, touches some hearts to…