Revelation 13:1

This verse uses the preposition ἐπὶ twice. The first time it is followed by a noun in the genitive, the second instance is followed by a plural noun in the accusative.

The preposition ἐπὶ with the accusative carries a sense of motion or direction toward or against something, rather than a static position. Therefore ἐπὶ τὰς κεφαλὰς could be understood as "against the heads" rather than merely "on" or "upon the heads."

The meaning of ἐπὶ changes depending on the case it governs: With the accusative (as in ἐπὶ τὰς κεφαλὰς), it often implies motion toward, onto, or even against something. With the genitive, it usually indicates position or location (e.g., "on top of" or "on/upon"). With the dative, it often conveys rest or position at a place. So, in the accusative case, ἐπὶ τὰς κεφαλὰς could be interpreted as "against the heads" in a context of action or hostility. For example, it might be used in warfare, judgment, or punishment settings, where something is directed toward or against someone's head.