מלכים א, פרק י״ח, פסוק כ״ה

During the public confrontation on Mount Carmel, Elijah dictates the terms of the test to the prophets of Baal and grants them the advantage of preparing their sacrifice first. By allowing them to select their own animal, Elijah gives them the opportunity to pick the absolute best bull available [מלבי״ם]. This is a deliberate move to eliminate any future excuses. If Elijah had chosen the animal for them, the false prophets could have later argued that his specific selection was the reason for their failure [ביאור שטיינזלץ].

Elijah also instructs them to proceed first, offering a simple reason: they are the larger group. On the surface, this is a matter of basic manners and proper etiquette, which dictate that the majority gets the right to act first [מצודת דוד]. However, a deeper tactical motive drives this decision. Elijah understands that if he were to offer his sacrifice first and God sent fire from heaven, the prophets of Baal would simply refuse to take their turn. They would excuse their failure by claiming that the fire would have fallen for them had they been given the chance to act first.

Furthermore, his reasoning about them being the majority carries a clever double meaning. While outwardly referencing their large numbers, it subtly hints at the forces of impurity and a world of division. Through this hidden meaning, Elijah implies that their path is entirely doomed to fail from the start. Therefore, it is absolutely necessary for them to act first, leaving them completely unaware of his true intentions [צוארי שלל].