Charles Ellicott Commentary 1 Kings 18:29

"And it was so, when midday was past, that they prophesied until the time of the offering of the [evening] oblation; but there was neither voice, nor any to answer, nor any that regarded." — 1 Kings 18:29 (ASV)

They prophesied— raved in their frenzy; like Saul in the hour of madness (1 Samuel 18:10), or of overpowering religious excitement (1 Samuel 19:20–24). As a rule, not perhaps without some rare exceptions, the true prophetic inspiration, even if felt as overmastering the will , gave no place to frenzy. The spirits of the prophets are subject to the prophets.