“And they will tell it to the inhabitants of this land: for they have heard that thou LORD art among this people, that thou LORD art seen face to face, and that thy cloud standeth over them, and that thou goest before them, by day time in a pillar of a cloud, and in a pillar of fire by night.”
King James Version (KJV)
14:12 I will smite them - This was not an absolute determination, but a commination, like that of Nineveh's destruction, with a condition implied, except there be speedy repentance, or powerful intercession.
14:16 Not able - His power was quite spent in bringing them out of Egypt, and could not finish the work he had begun and had sworn to do.