1 Samuel 19:20

Prophesying. That is, singing praises to God by a divine impulse. God was pleased on this occasion that both Saul's messengers and himself should experience the like impulse, that he might understand, by this instance of the divine power, how vain are the designs of man against him whom God protects. (Challoner) --- The messengers did not return. (Menochius) --- They were seized by the spirit only when they arrived at Najoth. But Saul felt the impression even at Socho, threw aside his garments, and began to act and to speak as one inspired. (Calmet)