Revelation 13:9

Ear - To work, till, or plough the ground.

Let - To hinder or obstruct.

If any man have an ear, let him hear - These words are evidently introduced to impress the reader with the awfulness of what has just been spoken - all shall worship him whose names are not written in the book of life, as well as to fix his attention upon the following words: -

If any man have an ear, let him hear - See the notes on Revelation 2:7. The idea here is, that what was here said respecting the "beast" was worthy of special attention, as it pertained to most important events in the history of the church.

13:9 If any one have an ear, let him hear — It was said before, "He that hath an ear, let him hear." This expression, if any, seems to imply, that scarce will any that hath an ear be found.

Let him hear — With all attention the following warning, and the whole description of the beast.