Jeremiah
1 Kings 18:13BSB·traditional attribution

Was it not reported to my lord what I did when Jezebel slaughtered the prophets of the LORD? I hid a hundred prophets of the LORD, fifty men per cave, and I provided them with food and water.

Matthew Henry Presbyterian @wholebiblehenry

In these verses we find, I. The sad state of Israel at this time, upon two accounts: - 1. Jezebel cut off the prophets of the Lord (Kg1 18:4), slew them, Kg1 18:13. Being an idolater, she was a persecutor, and made Ahab one.

Commenting on 1 Kings 18:1-16

John Gill Reformed Baptist @doctorgill

And Elijah said, as the Lord of hosts liveth, before whom I stand,.... In whose presence he was, and whose prophet and minister he was; he takes this oath, to assure Obadiah that he would certainly be upon the spot, or to be found, and not expose him to any danger: I will surely show myself unto him today; he was determined at all events...

Adam Clarke Methodist @methodicalclarke

When Jezebel slew the prophets - This persecution was probably during the dearth, for as this bad woman would attribute the public calamity to Elijah, not being able to find him, she would naturally wreak her vengeance on the prophets of Jehovah who were within her reach.